Error Code Table

Error #	Symbolic Constant	Error Message	Description
1001	`CPXERR_NO_MEMORY`	Out of memory	The computer has insufficient memory available to complete the selected operation. Downsize problem or increase the amount of physical memory available. Depending on the command, several memory conserving corrections can be made.
1002	`CPXERR_NO_ENVIRONMENT`	No environment	Be sure to pass a valid environment pointer to the routines.
1003	`CPXERR_BAD_ARGUMENT`	Bad argument to Callable Library function	An invalid argument was passed.
1004	`CPXERR_NULL_POINTER`	Null pointer for required data	A value of NULL passed to a routine where NULL is not allowed.
1006	CPXERR_CALLBACK	Error during callback	An error condition occurred during the callback, as, for example, when solving a MIP problem, if a callback asks for information that is not available from CPLEX.
1009	`CPXERR_NO_PROBLEM`	No problem exists	The requested command cannot be executed because no problem has been loaded.
1012	`CPXERR_LIMITS_TOO_BIG`	Problem size limits too large	One of the problem dimensions or read limits requires an array length beyond the architectural maximum of the computer.
1013	`CPXERR_BAD_PARAM_NUM`	Bad parameter number to CPLEX parameter routine	The CPLEX parameter number does not exist.
1014	`CPXERR_PARAM_TOO_SMALL`	Parameter value too small	CPLEX parameter value outside of range of possible values.
1015	`CPXERR_PARAM_TOO_BIG`	Parameter value too big	CPLEX parameter value outside of range of possible values.
1016	`CPXERR_PROMOTION_VERSION`	Promotional version. Problem size limits exceeded	The current problem size is too large for your version of CPLEX. Reduce problem size.
1017	`CPXERR_NOT_FOR_MIP`	Not available for mixed-integer problems	The requested operation can not be performed for mixed integer programs. Change problem type.
1018	`CPXERR_NOT_FOR_QP`	Not available for quadratic programs	The requested operation can not be performed for quadratic programs. Change problem type.
1019	`CPXERR_CHILD_OF_CHILD`	Cannot clone a cloned environment	`CPXparenv()` cannot be called from a child thread.
1020	`CPXERR_TOO_MANY_THREADS`	Thread limit exceeded	The maximum number of cloned threads has been exceeded.
1021	`CPXERR_CANT_CLOSE_CHILD`	Cannot close a child environment	It is not permitted to call `CPXcloseCPLEX()` on a child environment.
1022	`CPXERR_BAD_PROB_TYPE`	Unknown problem type. Problem not changed	`CPXchgprobtype()` could not change the problem type since an unknown type was specified.
1023	`CPXERR_NOT_ONE_PROBLEM`	Not a single problem, relaxed or fixed	No problem available, or problem is relaxed or fixed, and operation is inappropriate for those types of problems.
1024	`CPXERR_NOT_MIPCLASS.o`	Not a MILP, relaxed MILP, or fixed MILP	Function requires that problem type be CPXPROB_MILP, CPXPROB_RELAXEDMILP, or CPXPROB_FIXEDMILP.
1025	`CPXERR_NOT_QPCLASS`	Not a QP or zeroed QP	Function requires that QP data exist for the problem passed in.
1026	`CPXERR_STR_PARAM_TOO_LONG`	String parameter is too long	String length greater than 510
1027	`CPXERR_DECOMPRESSION`	Decompression of unpresolved model failed	CPLEX was unable to restore the original model, due for instance to insufficient memory.
1028	CPXERR_BAD_PARAM_NAME	Bad parameter name to CPLEX parameter routine	The parameter name does not exist.
1029	CPXERR_NOT_MIQPCLASS	Not a MIQP or fixed MIQP	Function requires that problem type be CPXPROB_MIQP or CPXPROB_FIXEDMIQP.
1051	`CPXERR_MSG_NO_CHANNEL`	No channel pointer supplied to message routine	No channel pointer supplied to message routine.
1052	`CPXERR_MSG_NO_FILEPTR`	No file pointer found for message routine	No file pointer found for message routine.
1053	`CPXERR_MSG_NO_FUNCTION`	No function pointer found for message routine	No function pointer found for message routine.
1100	`CPXERR_BOUNDS_INFEAS`	Bounds on '%s' contradictory	Check upper and lower bounds for the specified variable.
1101	`CPXERR_PRESLV_INForUNBD`	Presolve determines problem is infeasible or unbounded	The loaded problem contains blatant infeasibilities or unboundedness.
1103	`CPXERR_PRESLV_NO_PROB`	No presolved problem created	Most likely insufficient memory exists to complete the loading of the presolved problem.
1106	`CPXERR_PRESLV_ABORT`	Aborted during presolve	User halted presolve via callback.
1107	`CPXERR_PRESLV_BASIS_MEM`	Not enough memory to build basis for original LP	Insufficient memory exists to complete the uncrushing of the presolved problem.
1108	`CPXERR_PRESLV_COPYSOS`	Can't copy SOS info from original MIP	CPLEX's call to `CPXcopysos()` failed.
1109	`CPXERR_PRESLV_COPYORDER`	Can't copy priority order info from original MIP	CPLEX's call to `CPXcopyorder()` failed.
1110	`CPXERR_PRESLV_SOLN_MIP`	Not enough memory to recover solution for original MIP	Most likely insufficient memory exists to complete the uncrushing of the presolved problem.
1111	`CPXERR_PRESLV_SOLN_QP`	Not enough memory to compute solution to original QP	Most likely insufficient memory exists to complete the uncrushing of the presolved problem.
1112	`CPXERR_PRESLV_START_LP`	Not enough memory to build start for original LP	Most likely insufficient memory exists to complete the uncrushing of the presolved problem.
1114	`CPXERR_PRESLV_FAIL_BASIS`	Could not load unpresolved basis for original LP	Most likely insufficient memory exists to complete the uncrushing of the presolved problem.
1115	`CPXERR_PRESLV_NO_BASIS`	Failed to find basis in presolved LP	A basis could not be recovered during uncrushing most likely due to lack of memory.
1117	`CPXERR_PRESLV_INF`	Presolve determines problem is infeasible	The loaded problem contains blatant infeasibilities.
1118	`CPXERR_PRESLV_UNBD`	Presolve determines problem is unbounded	The loaded problem contains blatant unboundedness.
1119	`CPXERR_PRESLV_DUAL`	The feature is not available for solving dual formulation	Certain presolve features are not compatible with its creating an explicit dual formulation.
1120	`CPXERR_PRESLV_UNCRUSHFORM`	Can't uncrush solution form	Presolve could not create full solution
1121	`CPX_PRESLV_CRUSHFORM`	Can't crush solution form	Presolve could not reduce the solution
1122	`CPXERR_PRESLV_BAD_PARAM`	Bad presolve parameter setting	Dual presolve reductions (CPX_PARAM_REDUCE) were specified in the presence of lazy constraints, or nonlinear reductions (CPX_PARAM_PRELINEAR) were specified in the presence of user cuts.
1200	`CPXERR_INDEX_RANGE`	Index is outside range of valid values	Selected index is too large or small.
1201	`CPXERR_COL_INDEX_RANGE`	Column index %d out of range	The specified column index is negative or greater than or equal to the number of columns in the currently loaded problem.
1203	`CPXERR_ROW_INDEX_RANGE`	Row index %d out of range	The specified row index is negative or greater than or equal to the number of rows in the currently loaded problem.
1205	`CPXERR_INDEX_RANGE_LOW`	%s: 'begin' value %d is less than %d	The index in the query routine is too small.
1206	`CPXERR_INDEX_RANGE_HIGH`	%s: 'end' value %d is greater than %d	The index in the query routine is too large.
1207	`CPXERR_NEGATIVE_SURPLUS`	Insufficient array length	Array is too short to hold requested data.
1208	`CPXERR_ARRAY_TOO_LONG`	Array length too long	The number of norm values passed to `CPXcopypnorms()` or `CPXcopydnorms()` exceeds the number of columns or rows, respectively.
1209	`CPXERR_NAME_CREATION`	Unable to create default names	The current names of rows or columns don't allow the creation of default names.
1210	`CPXERR_NAME_NOT_FOUND`	Name not found	Name does not exist. Check `CPXgetcolindex()` or `CPXgetrowindex()` arguments.
1211	`CPXERR_NO_RHS_IN_OBJ`	'rhs' has no coefficient in 'obj'	You cannot make changes to the right-hand side of an objective row since no coefficients exist.
1215	`CPXERR_BAD_SENSE`	Illegal sense entry %d	Legal sense symbols are L, G, E and R.
1216	`CPXERR_NO_RNGVAL`	No range values	No ranges exist for this problem.
1217	`CPXERR_NO_SOLN`	No solution exists	The requested command cannot be executed because no solution exists for the problem. Optimize the problem first.
1219	`CPXERR_NO_NAMES`	No names exist	The requested operation is successful only if names have been assigned. Typically this failure occurs when reading a file, such as an ORD file, when no names were assigned during the prior call to `CPXreadcopyprob()`.
1221	`CPXERR_NOT_FIXED`	Only fixed variables are pivoted out	`CPXpivotout()` can pivot out only fixed variables.
1222	`CPXERR_DUP_ENTRY`	Duplicate entry	In `CPXchgcoeflist()`, a duplicate (row, column) pair was found.
1223	`CPXERR_NO_BARRIER_SOLN`	No barrier solution exists	The requested operation requires the existence of a barrier solution.
1224	`CPXERR_NULL_NAME`	Null pointer %d in name array	Null pointers are not allowed in name arrays.
1225	`CPXERR_NAN`	Numeric entry %d is not a double precision number (NAN)	The value is not a number.
1226	`CPXERR_ARRAY_NOT_ASCENDING`	Array entry %d not ascending	Entries in `matbeg` or `sosbeg` arrays must be ascending.
1227	`CPXERR_COUNT_RANGE`	Count entry %d negative or larger than allowed	Entries in `matcnt` arrays must be non-negative or less than the number of items possible, columns or rows for example.
1228	`CPXERR_COUNT_OVERLAP`	Count entry %d indicates overlapping entries	Entries in the `matcnt` array indicate that the specified items overlap.
1229	`CPXERR_BAD_LUB`	Illegal bound change indicator entry %d	The bound change indicators must be L, U, or B.
1230	`CPXERR_NODE_INDEX_RANGE`	Node index %d out of range	The specified node index is negative or greater than or equal to the number of nodes in the network.
1231	`CPXERR_ARC_INDEX_RANGE`	Arc index %d out of range	The specified arc index is negative or greater than or equal to the number of arcs in the network.
1251	`CPXERR_INDEX_NOT_BASIC`	Index must correspond to a basic variable	The requested variable is not basic.
1252	`CPXERR_NEED_OPT_SOLN`	Optimal solution required	An optimal solution must exist before the requested operation can be performed.
1253	`CPXERR_BAD_STATUS`	Invalid status entry %d for basis specification	The basis status values are out of range.
1254	`CPXERR_NOT_UNBOUNDED`	Unbounded solution required	The requested operation can only be performed on a problem determined to be unbounded.
1255	`CPXERR_SBASE_INCOMPAT`	Incompatible with superbasis	The requested operation is incompatible with an existing superbasis.
1256	`CPXERR_SINGULAR`	Basis singular	CPLEX cannot factorize a singular basis. See the discussion of numerical difficulties in the CPLEX User's Manual.
1257	`CPXERR_PRIIND`	Incorrect usage of pricing indicator	Pricing indicator value out of range.
1258	`CPXERR_NO_LU_FACTOR`	No LU factorization exists	The requested item requires the presence of a factorization. You may need to optimize with a 0 iteration limit to get a factorization.
1260	`CPXERR_NO_SENSIT`	Sensitivity analysis not available for current status	Sensitivity information is not available because an optimal basic solution does not exist for the currently loaded problem. Optimize the problem checking to ensure that it is not infeasible or unbounded.
1261	`CPXERR_NO_BASIC_SOLN`	No basic solution exists	The requested operation requires the existence of a basic solution. Apply primal or dual simplex or crossover.
1262	`CPXERR_NOBASIS`	No basis exists	The requested operation requires the existence of a basis.
1263	`CPXERR_ABORT_STRONGBRANCH`	Strong branching aborted	Strong branching, for variable selection, could not proceed because a subproblem optimization was aborted.
1264	`CPXERR_NO_NORMS`	No norms available	Norms not present. Change pricing and call the optimization routine.
1265	`CPXERR_NOT_DUAL_UNBOUNDED`	Dual unbounded solution required	The called function requires that the LP stored in the problem object has been determined to be primal infeasible by the dual simplex algorithm.
1266	`CPXERR_TILIM_STRONGBRANCH`	Time limit reached in strong branching	Strong branching was not completed due to reaching the time limit.
1267	`CPXERR_BAD_PIVOT`	Illegal pivot	This occurs if illegal or bad Simplex pivots are attempted. Examples are trying to remove nonbasic variables from the basis or selecting a zero column to enter the basis. Also, this error code may be generated if a pivot would yield a numerically unstable or singular basis.
1268	`CPXERR_TILIM_CONDITION_NO`	Time limit reached in computing condition number	Condition number computation was not completed due to reaching the time limit.
1269	`CPXERR_ABORT_CONDITION_NO`	Condition number computation aborted	The computation of Kappa was terminated early, due to a user interrupt or other reason.
1292	`CPXERR_BAD_METHOD`	Invalid choice of optimization method	Unknown method selected for `CPXhybnetopt()` or `CPXhybbaropt()`. Select `CPX_ALG_PRIMAL` or `CPX_ALG_DUAL`.
1421	`CPXERR_NO_FILENAME`	File name not specified	A filename must be specified for the requested operation to succeed.
1422	`CPXERR_FAIL_OPEN_WRITE`	Could not open file '%s' for writing	CPLEX could not create the specified file. Check the file specification.
1423	`CPXERR_FAIL_OPEN_READ`	Could not open file '%s' for reading	CPLEX could not read the specified file. Check the file specification.
1424	`CPXERR_BAD_FILETYPE`	Invalid filetype	Invalid file type passed to routine requiring a file type
1431	`CPXERR_TOO_MANY_ROWS`	Too many rows	The problem contains more rows than are allowed.
1432	`CPXERR_TOO_MANY_COLS`	Too many columns	The problem contains more columns than are allowed.
1433	`CPXERR_TOO_MANY_COEFFS`	Too many coefficients	The problem contains more matrix coefficients than are allowed.
1434	`CPXERR_BAD_NUMBER`	Line %d: Couldn't convert '%s' to a number	CPLEX was unable to interpret a string entry as a number on the indicated line.
1435	`CPXERR_BAD_EXPO_RANGE`	Line %d: Exponent '%s' out of range	An exponent on the indicated line is greater than the largest permitted for your computer system.
1436	`CPXERR_NO_OBJ_SENSE`	Max or Min missing	The objective function sense indicator is missing from the LP file. No problem is read.
1441	`CPXERR_NO_NAME_SECTION`	Line %d: No NAME section	The required MPS file NAME section is missing.
1442	`CPXERR_BAD_SOS_TYPE`	Line %d: Unrecognized SOS type: %c%c	Only SOS Types S1 or S2 can be specified within an SOS or MPS file.
1443	`CPXERR_COL_ROW_REPEATS`	Column '%s' has repeated row '%s'	The indicated column appears more than once in a row. Check the MPS file for duplicate entries.
1444	`CPXERR_RIM_ROW_REPEATS`	%s '%s' has repeated row '%s'	The MPS file contains duplicate row names.
1445	`CPXERR_ROW_REPEATS`	Row '%s' repeats	The MPS problem contains duplicate row entries. Inspect and edit the file.
1446	`CPXERR_COL_REPEATS`	Column '%s' repeats	The MPS problem file contains duplicate column entries. Inspect and edit the file.
1447	`CPXERR_RIM_REPEATS`	Line %d: %s '%s' repeats	The MPS file contains duplicate names.
1448	`CPXERR_ROW_UNKNOWN`	Line %d: '%s' is not a row name	The MPS file specifies a row name that does not exist.
1449	`CPXERR_COL_UNKNOWN`	Line %d: '%s' is not a column name	The MPS file specifies a column name that does not exist.
1453	`CPXERR_NO_ROW_SENSE`	Line %d: No row sense	No sense indicator was found on the indicated line.
1454	`CPXERR_EXTRA_FX_BOUND`	Line %d: 'FX' bound type illegal when prior bound given	A column with either an upper or lower bound previously assigned has an illegal FX bound assignment. Since the FX bound type fixes both upper and lower bounds, no additional bounds can be specified. Check the MPS file.
1455	`CPXERR_EXTRA_FR_BOUND`	Line %d: 'FR' bound type illegal when prior bound given	A column with an upper or lower bound previously assigned has an illegal FR bound assignment. Since the FR bound type has neither an upper nor lower bound, no other bound type can be specified. Check the MPS file.
1456	`CPXERR_EXTRA_BV_BOUND`	Line %d: 'BV' bound type illegal when prior bound given	Check the MPS file for bound values which conflict with this type specification.
1457	`CPXERR_BAD_BOUND_TYPE`	Line %d: Unrecognized bound type '%s'	An unrecognized bounds sense indicator appears in the MPS file. Acceptable bound senses are BV, LI, UI, UP, LO, FX, FR, MI, PL, and SC.
1458	`CPXERR_UP_BOUND_REPEATS`	Line %d: Repeated upper bound	The upper bound for a column is repeated within the problem file on the indicated line. Two individual upper bounds could exist. Alternately, a PL bound and individual bound could be in conflict. Check the MPS file.
1459	`CPXERR_LO_BOUND_REPEATS`	Line %d: Repeated lower bound	The lower bound for a column is repeated within the problem file on the indicated line. Two individual lower bounds could exist. Alternately, an MI bound and individual lower bound could be in conflict. Check the MPS file.
1460	`CPXERR_NO_BOUND_TYPE`	Line %d: Bound type missing	No bound type could be found for the indicated column bound on the indicated line. Check the MPS file.
1461	`CPXERR_NO_QMATRIX_SECTION`	Line %d: No QMATRIX section	The required QMATRIX section for quadratic programs is missing from the QP file. Check the file.
1462	`CPXERR_BAD_SECTION_ENDATA`	Line %d: Unrecognized section indicator. Expecting ENDATA	An unrecognized MPS file section indicator after the COLUMNS section of the MPS file.
1463	`CPXERR_INT_TOO_BIG_INPUT`	Line %d: Magnitude exceeds integer limit	A number has been read that is larger than the biggest integer value that can be represented by the computer.
1464	`CPXERR_NAME_TOO_LONG`	Line %d: Identifier/name too long to process	The length of the identifier or name was beyond the size CPLEX can process.
1471	`CPXERR_NO_ROWS_SECTION`	Line %d: No ROWS section	No ROW section was found in the MPS file.
1472	`CPXERR_NO_COLUMNS_SECTION`	Line %d: No COLUMNS section	The required COLUMNS section is missing from the MPS file. Check the file.
1473	`CPXERR_BAD_SECTION_BOUNDS`	Line %d: Unrecognized section indicator. Expecting RANGES, BOUNDS, QMATRIX, or ENDATA	An unrecognized MPS file section indicator after the COLUMNS section of the MPS file.
1474	`CPXERR_RANGE_SECTION_ORDER`	Line %d: 'RANGES' section out of order	The RANGES section can only appear after the RHS section in an MPS file.
1475	`CPXERR_BAD_SECTION_QMATRIX`	Line %d: Unrecognized section indicator. Expecting QMATRIX or ENDATA	An unrecognized MPS file section indicator after the RHS or BOUNDS section of the MPS file.
1476	`CPXERR_NO_OBJECTIVE`	Line %d: No objective row found	No free row was found in the MPS file. Check the file. At least one free row must be present. Free rows have an 'N' sense beginning in column 2.
1477	`CPXERR_ROW_REPEAT_PRINT`	%d Row repeats messages not printed	The MPS problem or REV file contains duplicate row entries. Inspect and edit the file.
1478	`CPXERR_COL_REPEAT_PRINT`	%d Column repeats messages not printed	The MPS problem or REV file contains duplicate column entries. Inspect and edit the file.
1479	`CPXERR_RIMNZ_REPEATS`	Line %d: %s %s repeats	The MPS file contains duplicate entries in an extra rim vector.
1480	`CPXERR_EXTRA_INTORG`	Line %d: 'INTORG' found while reading integers	Integer markers are incorrectly positioned in the MPS file.
1481	`CPXERR_EXTRA_INTEND`	Line %d: 'INTEND' found while not reading integers	Integer markers are incorrectly positioned in the MPS file.
1482	`CPXERR_EXTRA_SOSORG`	Line %d: 'SOSORG' found while reading a SOS	SOS markers are incorrectly positioned in the MPS file.
1483	`CPXERR_EXTRA_SOSEND`	Line %d: 'SOSEND' found while not reading a SOS	SOS markers are incorrectly positioned in the MPS file.
1484	`CPXERR_TOO_MANY_RIMS`	Too many rim vectors	Reset the rim vector read limit to a larger number.
1485	`CPXERR_TOO_MANY_RIMNZ`	Too many rim nonzeros	Reset the rim vector nonzero read limit to a larger number.
1486	`CPXERR_NO_ROW_NAME`	Line %d: No row name	A row name is missing within the ROWS section.
1487	`CPXERR_BAD_OBJ_SENSE`	Line %d: Unrecognized objective sense '%s'	There is an OBJSENSE line in an MPS problem file, but CPLEX can not locate the MIN or MAX objective sense statement. Check the MPS file for correct syntax. See the CPLEX User's Manual for a description of MPS format.
1530	`CPXERR_NET_DATA`	Inconsistent network file	Check the NET format file for errors.
1531	`CPXERR_NOT_MIN_COST_FLOW`	Not a min-cost flow problem	Check the MIN format file for errors.
1532	`CPXERR_BAD_ROW_ID`	Incorrect row identifier	Selected row does not exist.
1537	`CPXERR_BAD_CHAR`	Illegal character	Character not allowed. See NET or MIN format descriptions.
1538	`CPX_NET_FILE_SHORT`	Unexpected end of network file	Check the NET format file for errors.
1550	`CPXERR_BAS_FILE_SHORT`	Basis missing some basic variables	Number of basic variables is less than the number of rows.
1551	`CPXERR_BAD_INDICATOR`	Line %d: Unrecognized basis indicator '%s'	An invalid basis indicator appears in the BAS file.
1552	`CPXERR_NO_ENDATA`	'ENDATA' missing	BAS files must have an ENDATA record as the last line of the file.
1553	`CPXERR_FILE_ENTRIES`	Line %d: Wrong number of entries	The BAS or VEC file contains a line with too many entries.
1554	`CPXERR_SBASE_ILLEGAL`	Superbases are not allowed	Basis or restart file contains superbasis that cannot be read.
1555	`CPXERR_BAS_FILE_SIZE`	%d %s basic variable(s)	Number of basic variables doesn't match the problem. Check `CPXcopybase()` call.
1556	`CPXERR_NO_VECTOR_SOLN`	Vector solution does not exist	Could not write VEC file because no vector solution is available.
1560	`CPXERR_NOT_SAV_FILE`	File '%s' is not a SAV file	The selected file does not match the type specified.
1561	`CPXERR_SAV_FILE_DATA`	Not enough data in SAV file	The file is corrupted or was generated by an incompatible version of the software.
1562	`CPXERR_SAV_FILE_WRITE`	Unable to write SAV file to disk	CPLEX could not open or write to the requested SAV file. Check the file designation and disk space.
1563	`CPXERR_FILE_FORMAT`	File '%s' has an incompatible format. Try setting 'reverse' flag	When reading a binary file produced on a different computer system, setting the reverse byte ordering may allow reading.
1602	`CPXERR_ADJ_SIGNS`	Lines %d,%d: Adjacent signs	The previous line ended with a "+" or a "-" and that the subsequent line must start with a variable name rather than an operator.
1603	`CPXERR_RHS_IN_OBJ`	Line %d: RHS sense in objective	The objective row erroneously includes a sense indicator.
1604	`CPXERR_ADJ_SIGN_SENSE`	Lines %d,%d: Adjacent sign and sense	A sense indicator erroneously follows an arithmetic operator.
1605	`CPXERR_QUAD_IN_ROW`	Line %d: Quadratic term in constraint	Quadratic terms are allowed only in the objective function.
1606	`CPXERR_ADJ_SIGN_QUAD`	Lines %d,%d: Adjacent sign and quadratic character	The previous line ended with a "+" or a "-" and that the subsequent line must start with a variable name rather than an one of the reserved quadratic characters []*^.
1607	`CPXERR_NO_OPERATOR`	Line %d: Expected '+' or '-', found '%c'	Some character other than '+' or '-' appears between variable names on the indicated line.
1608	`CPXERR_NO_OP_OR_SENSE`	Line %d: Expected '+','-' or sense, found '%c'	Some character other than a + or - operator, as required, appears on the indicated line.
1609	`CPXERR_NO_ID_FIRST`	Line %d: Expected identifier first	A variable name is missing on the indicated line.
1610	`CPXERR_NO_RHS_COEFF`	Line %d: Expected RHS coefficient	No RHS coefficient is present after the sense indicator on the indicated line.
1611	`CPXERR_NO_NUMBER_FIRST`	Line %d: Expected number first	Some character other than a number, as required, appears on the indicated line.
1612	`CPXERR_NO_QUAD_EXP`	Line %d: Expected quadratic exponent	An exponent of 2 is expected after the ^ operator
1613	`CPXERR_QUAD_EXP_NOT_2`	Line %d: Quadratic exponent must be 2	Only an exponent of 2 is allowed after the exponentiation operator ^.
1614	`CPXERR_NO_QP_OPERATOR`	Line %d: Expected ^ or *	The ^ or * operator is missing from the QP term.
1615	`CPXERR_NO_NUMBER`	Line %d: Expected number, found '%c'	Some character other than a number, as required, appears on the indicated line.
1616	`CPXERR_NO_ID`	Line %d: Expected identifier, found '%c'	Instead of the expected identifier CPLEX found the character shown.
1617	`CPXERR_BAD_ID`	Line %d: '%s' not valid identifier	An illegal variable or row name exists on the indicated line.
1618	`CPXERR_BAD_EXPONENT`	Line %d: Exponent '%s' not %s with number	The characters following an exponent on the indicated line are not numbers.
1619	CPXERR_Q_DIVISOR	Line %d: Missing or incorrect divisor for Q terms	Quadratic terms must be enclosed in square brackets and followed by a divide sign with divisor 2, i.e., [ ]/2.
1621	`CPXERR_NO_BOUND_SENSE`	Line %d: No bound sense	The sense indicator is missing on the indicated line.
1622	`CPXERR_BAD_BOUND_SENSE`	Line %d: Invalid bound sense	An invalid bounds sense indicator appears in the LP file. Acceptable bound senses are "<", ">", "=", or "free".
1623	`CPXERR_NO_NUMBER_BOUND`	Line %d: Missing bound number	The bound data is missing from the LP file. CPLEX expected a number where no number was found.
1624	`CPXERR_LP_TOO_MANY_ROWS`	Line %d: More than %d constraints	Extra space is insufficient. Increase extra space using read limits.
1625	`CPXERR_LP_TOO_MANY_COLS`	Line %d: More than %d variables	Extra space is insufficient. Increase extra space using read limits.
1626	`CPXERR_LP_TOO_MANY_COEFFS`	Line %d: More than %d coefficients	Extra space is insufficient. Increase extra space using read limits.
1627	CPXERR_NO_SOS_SEPARATOR	Expected ':', found '%c'	The separator "::" must follow the S1 or S2 declaration.
1650	`CPXERR_INVALID_NUMBER`	Number not representable in exponential notation	The number to be printed is not representable.
1701	`CPXERR_IIS_NO_INFO`	No IIS information exists	The IIS algorithm found no IIS sets, so the routine `CPXgetiis()` fails. Callable Library users see this message if `CPXgetiis()` or `CPXdisplayiis()` is called before computing the IIS.
1702	`CPXERR_IIS_NO_SOLN`	No solution exists; infeasibility analysis not available	The requested command cannot be executed because no solution exists for the problem. Optimize the problem first.
1703	`CPXERR_IIS_FEAS`	Problem is feasible; no IIS available	The problem solved with indication of numerical uncertainty. It may be feasible.
1704	`CPXERR_IIS_NOT_INFEAS`	Problem may be feasible; no IIS available	The problem solved with indication of numerical uncertainty. It may be feasible.
1705	`CPXERR_IIS_OPT_INFEAS`	Problem optimal with unscaled infeasibilities. No IIS available	The problem solved with only unscaled infeasibilities. The IIS algorithm cannot be applied.
1706	`CPXERR_IIS_DEFAULT`	Unable to compute an IIS	The problem solved with indication of numerical uncertainty. It may be feasible.
1707	`CPXERR_IIS_NO_BASIC`	Infeasibility Finder requires a basic solution	Primal or dual simplex or crossover from a barrier solution must first be used prior to applying the IIS algorithm.
1708	`CPXERR_IIS_NO_PRIMAL`	Infeasibility Finder requires a primal infeasible basis	An IIS can be determined only if a primal method finds the problem to be primal infeasible.
1709	`CPXERR_IIS_NO_LOAD`	Failed to load IIS subproblem	Most likely there is insufficient memory to perform the IIS analysis.
1710	`CPXERR_IIS_SUB_OBJ_LIM`	Objective limit reached on IIS subproblem	Indicated limit hit during the solution of a subproblem.
1711	`CPXERR_IIS_SUB_IT_LIM`	Iteration limit reached on IIS subproblem	Indicated limit hit during the solution of a subproblem.
1712	`CPXERR_IIS_SUB_TIME_LIM`	Time limit reached on IIS subproblem	Indicated limit hit during the solution of a subproblem.
1713	`CPXERR_IIS_NUM_BEST`	Unable to optimize IIS subproblem	Status of subproblem optimization is unknown due to numerical uncertainty. Check scaling of problem.
1801	`CPXERR_WORK_FILE_OPEN`	Could not open temporary file	CPLEX was unable to access a temporary file in the directory specified by CPX_PARAM_WORKDIR.
1802	`CPXERR_WORK_FILE_READ`	Failure on temporary file read	CPLEX was unable to read a temporary file in the directory specified by CPX_PARAM_WORKDIR.
1803	`CPXERR_WORK_FILE_WRITE`	Failure on temporary file write	CPLEX was unable to write a temporary file in the directory specified by CPX_PARAM_WORKDIR.
3002	`CPXERR_BOUNDS_BINARY`	Binary variable '%s' has value outside [0,1]	The referenced variable, type binary, has been assigned bounds outside of 0 and 1. Change the bounds to 0 and 1.
3003	`CPXERR_NOT_MIP`	Not a mixed-integer problem	The requested operation can only be performed on a mixed integer problem.
3004	`CPXERR_SOS_BOUNDS`	Infeasible bounds for set number %d	An SOS exists with variable having upper or lower bounds such that no feasible solution exists.
3006	`CPXERR_BAD_PRIORITY`	Negative priority entry %d	Priority orders must be positive integer values.
3007	`CPXERR_ORDER_BAD_DIRECTION`	Illegal direction entry %d	Legal direction entries are limited to the values `CPX_BRANCH_GLOBAL`, `CPX_BRANCH_DOWN`, and `CPX_BRANCH_UP`.
3009	`CPXERR_ARRAY_BAD_SOS_TYPE`	Illegal sostype entry %d	Only `sostype` values of 1 or 2 are legal.
3010	`CPXERR_UNIQUE_WEIGHTS`	Set does not have unique weights	SOS weights must be unique.
3011	`CPXERR_BOUNDS_INT`	Non-integral %s bound value %g for integer column '%s'	Check to be sure that bounds for integer variables have integer values.
3012	`CPXERR_BAD_DIRECTION`	Line %d: Unrecognized direction '%c%c'	Only UP and DN are accepted as branching directions beginning in column 2 of an ORD file.
3015	`CPXERR_NO_SOS`	No user-defined SOSs exist	SOS information can be written to a file only if already defined. SOS Type 3 information (found using the SOSSCAN feature) cannot be written to an SOS file.
3016	`CPXERR_NO_ORDER`	No priority order exists	The requested command cannot be executed because no priority order has been loaded.
3017	`CPXERR_NO_INT_SOLN`	No integer feasible solution exists	An integer feasible solution must exist before the requested operation can be performed.
3018	`CPXERR_INT_TOO_BIG`	Magnitude of variable %s: %g exceeds integer limit	`CPXmipopt()` tried to branch on the indicated integer variable at a value larger than representable in the branch-and-bound tree. Check model formulation.
3019	`CPXERR_SUBPROB_SOLVE`	Failure to solve MIP subproblem	`CPXmipopt()` failed to solve one of the subproblems in the branch-and-bound tree. This can be due to a limit (for example, an iteration limit) or numerical trouble. Check the log, or add a call to `CPXgetsubstat()` (in the Callable Library) for information on the cause.
3020	`CPXERR_NO_MIPSTART`	No MIP start exists	`CPXgetmipstart()` failed because no MIP start data is available for the problem.
3021	`CPXERR_BAD_CTYPE`	Illegal ctype entry %d	An illegal `ctype` character has been passed to `CPXchgctype()`. Use one of 'C', 'B', 'I', `S' or `N'.
3022	`CPXERR_SEMI_BDS`	Infinite bds on semi-continuous or semi-integer variable %d	Semi-continuous or semi-integer variables must have finite bounds.
3023	CPXERR_NO_INT_X	Integer feasible solution values are unavailable	When the incumbent for the problem has been provided by a MIP Start or by an advanced callback function working on the original problem, the incumbent solution values are not available for the reduced problem.
3301	`CPXERR_MISS_SOS_TYPE`	Line %d: Missing SOS type	SOS type not specified.
3401	`CPXERR_TRE_FILE_DATA`	Not enough data in TRE file	The TRE file became corrupted.
3402	`CPXERR_TRE_FILE_WRITE`	Error on write to TRE file	The TRE file could not be written. Check available disk space.
3403	`CPXERR_TRE_FILE_VERSION`	Can't read TRE file written by CPLEX %s (Current version is %s)	The TRE file could not be interpreted and may be corrupted or produced by an incompatible prior version of CPLEX.
3404	`CPXERR_TRE_FILE_OBJ`	Objective names in TRE file %s do not match current problem	The problem being solved must match that at the time the TRE file was created.
3405	`CPXERR_TRE_FILE_COLS`	Tree in file %s does not match the current problem. Number of variables in TRE file: %d. Number of variables in current problem: %d	The problem being solved must match that at the time the TRE file was created.
3406	`CPXERR_TRE_FILE_ROWS`	Tree in file %s does not match the current problem. Number of constraints in TRE file: %d. Number of constraints in current problem: %d	The problem being solved must match that at the time the TRE file was created.
3407	`CPXERR_TRE_FILE_INTS`	Tree in file %s does not match the current problem. Number of integer variables in TRE file: %d. Number of integer variables in current problem: %d	The problem being solved must match that at the time the TRE file was created.
3408	`CPXERR_TRE_FILE_NONZ`	Tree in file %s does not match the current problem. Number of nonzeros in TRE file: %d. Number of nonzeros in current problem: %d	The problem being solved must match that at the time the TRE file was created.
3409	`CPXERR_TRE_FILE_TYPES`	Different type in TRE file %s for variable '%s'	The problem being solved must match that at the time the TRE file was created.
3410	`CPXERR_TRE_FILE_PRESOLVE`	Presolve setting for %s in file %s does not match the current setting	The presolve settings in effect at the time the TRE file was generated must match those at the time it is read.
3412	`CPXERR_NO_TREE`	Current problem has no tree	No tree exists until after the mixed integer optimization has begun.
3413	`CPXERR_TREE_MEMORY_LIMIT`	Tree memory limit exceeded	The reading of the tree file has stopped because the tree memory limit has been reached.
3414	`CPXERR_TRE_FILE_FORMAT`	File '%s' has an incompatible format	The TRE file was produced on a computer with a different byte ordering scheme.
3501	`CPXERR_NODE_FILE_OPEN`	Could not open node file	CPLEX failed to open a node file for updating.
3502	`CPXERR_NODE_FILE_READ`	Failure on node file read	CPLEX failed to read from a node file.
3503	`CPXERR_NODE_FILE_WRITE`	Failure on node file write	CPLEX failed to write to a node file.
3504	`CPXERR_NODE_ON_DISK`	No callback info ondisk/compressed nodes	Information on nodes stored in node files is not available through the advanced callback functions.
3601	`CPXERR_PTHREAD_MUTEX_INIT`	Could not initialize mutex	A system call needed to initialize parallel MIP
3603	`CPXERR_PTHREAD_CREATE`	Could not create thread	A system call needed to initialize parallel MIP failed.
5001	`CPXERR_BAD_Q`	Invalid quadratic matrix. Unequal off-diagonal components	The Q matrix must be symmetric.
5002	`CPXERR_Q_NOT_POS_DEF`	Q is not positive semi-definite	The Q matrix must be positive semi-definite (for minimizations) to apply the Barrier algorithm. Check the quadratic term.
5004	`CPXERR_NOT_QP`	Not a quadratic program	The requested operation can only be performed on a quadratic problem.
5011	`CPXERR_Q_DUP_ENTRY`	Duplicate entry for pair '%s' and '%s'	Duplicate entries for the quadratic term exist.
5012	`CPXERR_Q_NOT_SYMMETRIC`	Q is not symmetric	The Q matrix must be symmetric. Check off diagonal element.
5014	CPXERR_Q_NOT_INDEF	Q is not indefinite	Function requires that the Q matrix be indefinite.
32201		Licensing problem	A licensing error has occurred. Check the ILOG_LICENSE_FILE environment variable. For more information, consult the troubleshooting section of the ILOG License Manager User's Guide & Reference.

CPXERR_NO_MEMORY

The computer has insufficient memory available to complete the selected operation. Downsize problem or increase the amount of physical memory available. Depending on the command, several memory conserving corrections can be made.

1002

CPXERR_NO_ENVIRONMENT

No environment

Be sure to pass a valid environment pointer to the routines.

1003

CPXERR_BAD_ARGUMENT

Bad argument to Callable Library function

An invalid argument was passed.

1004

CPXERR_NULL_POINTER

Null pointer for required data

A value of NULL passed to a routine where NULL is not allowed.

1006

CPXERR_CALLBACK

Error during callback

An error condition occurred during the callback, as, for example, when solving a MIP problem, if a callback asks for information that is not available from CPLEX.

1009

CPXERR_NO_PROBLEM

No problem exists

The requested command cannot be executed because no problem has been loaded.

1012

CPXERR_LIMITS_TOO_BIG

Problem size limits too large

One of the problem dimensions or read limits requires an array length beyond the architectural maximum of the computer.

1013

CPXERR_BAD_PARAM_NUM

Bad parameter number to CPLEX parameter routine

The CPLEX parameter number does not exist.

1014

CPXERR_PARAM_TOO_SMALL

Parameter value too small

CPLEX parameter value outside of range of possible values.

1015

CPXERR_PARAM_TOO_BIG

Parameter value too big

CPLEX parameter value outside of range of possible values.

1016

CPXERR_PROMOTION_VERSION

Promotional version. Problem size limits exceeded

The current problem size is too large for your version of CPLEX. Reduce problem size.

1017

CPXERR_NOT_FOR_MIP

Not available for mixed-integer problems

The requested operation can not be performed for mixed integer programs. Change problem type.

1018

CPXERR_NOT_FOR_QP

Not available for quadratic programs

The requested operation can not be performed for quadratic programs. Change problem type.

1019

CPXERR_CHILD_OF_CHILD

Cannot clone a cloned environment

CPXparenv() cannot be called from a child thread.

1020

CPXERR_TOO_MANY_THREADS

Thread limit exceeded

The maximum number of cloned threads has been exceeded.

1021

CPXERR_CANT_CLOSE_CHILD

Cannot close a child environment

It is not permitted to call CPXcloseCPLEX() on a child environment.

1022

CPXERR_BAD_PROB_TYPE

Unknown problem type. Problem not changed

CPXchgprobtype() could not change the problem type since an unknown type was specified.

1023

CPXERR_NOT_ONE_PROBLEM

Not a single problem, relaxed or fixed

No problem available, or problem is relaxed or fixed, and operation is inappropriate for those types of problems.

1024

CPXERR_NOT_MIPCLASS.o

Not a MILP, relaxed MILP, or fixed MILP

Function requires that problem type be CPXPROB_MILP, CPXPROB_RELAXEDMILP, or CPXPROB_FIXEDMILP.

1025

CPXERR_NOT_QPCLASS

Not a QP or zeroed QP

Function requires that QP data exist for the problem passed in.

1026

CPXERR_STR_PARAM_TOO_LONG

String parameter is too long

String length greater than 510

1027

CPXERR_DECOMPRESSION

Decompression of unpresolved model failed

CPLEX was unable to restore the original model, due for instance to insufficient memory.

1028

CPXERR_BAD_PARAM_NAME

Bad parameter name to CPLEX parameter routine

The parameter name does not exist.

1029

CPXERR_NOT_MIQPCLASS

Not a MIQP or fixed MIQP

Function requires that problem type be CPXPROB_MIQP or CPXPROB_FIXEDMIQP.

1051

CPXERR_MSG_NO_CHANNEL

No channel pointer supplied to message routine

No channel pointer supplied to message routine.

1052

CPXERR_MSG_NO_FILEPTR

No file pointer found for message routine

No file pointer found for message routine.

1053

CPXERR_MSG_NO_FUNCTION

No function pointer found for message routine

No function pointer found for message routine.

1100

CPXERR_BOUNDS_INFEAS

Bounds on '%s' contradictory

Check upper and lower bounds for the specified variable.

1101

CPXERR_PRESLV_INForUNBD

Presolve determines problem is infeasible or unbounded

The loaded problem contains blatant infeasibilities or unboundedness.

1103

CPXERR_PRESLV_NO_PROB

No presolved problem created

Most likely insufficient memory exists to complete the loading of the presolved problem.

1106

CPXERR_PRESLV_ABORT

Aborted during presolve

User halted presolve via callback.

1107

CPXERR_PRESLV_BASIS_MEM

Not enough memory to build basis for original LP

Insufficient memory exists to complete the uncrushing of the presolved problem.

1108

CPXERR_PRESLV_COPYSOS

Can't copy SOS info from original MIP

CPLEX's call to CPXcopysos() failed.

1109

CPXERR_PRESLV_COPYORDER

Can't copy priority order info from original MIP

CPLEX's call to CPXcopyorder() failed.

1110

CPXERR_PRESLV_SOLN_MIP

Not enough memory to recover solution for original MIP

Most likely insufficient memory exists to complete the uncrushing of the presolved problem.

1111

CPXERR_PRESLV_SOLN_QP

Not enough memory to compute solution to original QP

Most likely insufficient memory exists to complete the uncrushing of the presolved problem.

1112

CPXERR_PRESLV_START_LP

Not enough memory to build start for original LP

Most likely insufficient memory exists to complete the uncrushing of the presolved problem.

1114

CPXERR_PRESLV_FAIL_BASIS

Could not load unpresolved basis for original LP

Most likely insufficient memory exists to complete the uncrushing of the presolved problem.

1115

CPXERR_PRESLV_NO_BASIS

Failed to find basis in presolved LP

A basis could not be recovered during uncrushing most likely due to lack of memory.

1117

CPXERR_PRESLV_INF

Presolve determines problem is infeasible

The loaded problem contains blatant infeasibilities.

1118

CPXERR_PRESLV_UNBD

Presolve determines problem is unbounded

The loaded problem contains blatant unboundedness.

1119

CPXERR_PRESLV_DUAL

The feature is not available for solving dual formulation

Certain presolve features are not compatible with its creating an explicit dual formulation.

1120

CPXERR_PRESLV_UNCRUSHFORM

Can't uncrush solution form

Presolve could not create full solution

1121

CPX_PRESLV_CRUSHFORM

Can't crush solution form

Presolve could not reduce the solution

1122

CPXERR_PRESLV_BAD_PARAM

Bad presolve parameter setting

Dual presolve reductions (CPX_PARAM_REDUCE) were specified in the presence of lazy constraints, or nonlinear reductions (CPX_PARAM_PRELINEAR) were specified in the presence of user cuts.

1200

CPXERR_INDEX_RANGE

Index is outside range of valid values

Selected index is too large or small.

1201

CPXERR_COL_INDEX_RANGE

Column index %d out of range

The specified column index is negative or greater than or equal to the number of columns in the currently loaded problem.

1203

CPXERR_ROW_INDEX_RANGE

Row index %d out of range

The specified row index is negative or greater than or equal to the number of rows in the currently loaded problem.

1205

CPXERR_INDEX_RANGE_LOW

%s: 'begin' value %d is less than %d

The index in the query routine is too small.

1206

CPXERR_INDEX_RANGE_HIGH

%s: 'end' value %d is greater than %d

The index in the query routine is too large.

1207

CPXERR_NEGATIVE_SURPLUS

Insufficient array length

Array is too short to hold requested data.

1208

CPXERR_ARRAY_TOO_LONG

Array length too long

The number of norm values passed to CPXcopypnorms() or CPXcopydnorms() exceeds the number of columns or rows, respectively.

1209

CPXERR_NAME_CREATION

Unable to create default names

The current names of rows or columns don't allow the creation of default names.

1210

CPXERR_NAME_NOT_FOUND

Name not found

Name does not exist. Check CPXgetcolindex() or CPXgetrowindex() arguments.

1211

CPXERR_NO_RHS_IN_OBJ

'rhs' has no coefficient in 'obj'

You cannot make changes to the right-hand side of an objective row since no coefficients exist.

1215

CPXERR_BAD_SENSE

Illegal sense entry %d

Legal sense symbols are L, G, E and R.

1216

CPXERR_NO_RNGVAL

No range values

No ranges exist for this problem.

1217

CPXERR_NO_SOLN

No solution exists

The requested command cannot be executed because no solution exists for the problem. Optimize the problem first.

1219

CPXERR_NO_NAMES

No names exist

The requested operation is successful only if names have been assigned. Typically this failure occurs when reading a file, such as an ORD file, when no names were assigned during the prior call to CPXreadcopyprob().

1221

CPXERR_NOT_FIXED

Only fixed variables are pivoted out

CPXpivotout() can pivot out only fixed variables.

1222

CPXERR_DUP_ENTRY

Duplicate entry

In CPXchgcoeflist(), a duplicate (row, column) pair was found.

1223

CPXERR_NO_BARRIER_SOLN

No barrier solution exists

The requested operation requires the existence of a barrier solution.

1224

CPXERR_NULL_NAME

Null pointer %d in name array

Null pointers are not allowed in name arrays.

1225

CPXERR_NAN

Numeric entry %d is not a double precision number (NAN)

The value is not a number.

1226

CPXERR_ARRAY_NOT_ASCENDING

Array entry %d not ascending

Entries in matbeg or sosbeg arrays must be ascending.

1227

CPXERR_COUNT_RANGE

Count entry %d negative or larger than allowed

Entries in matcnt arrays must be non-negative or less than the number of items possible, columns or rows for example.

1228

CPXERR_COUNT_OVERLAP

Count entry %d indicates overlapping entries

Entries in the matcnt array indicate that the specified items overlap.

1229

CPXERR_BAD_LUB

Illegal bound change indicator entry %d

The bound change indicators must be L, U, or B.

1230

CPXERR_NODE_INDEX_RANGE

Node index %d out of range

The specified node index is negative or greater than or equal to the number of nodes in the network.

1231

CPXERR_ARC_INDEX_RANGE

Arc index %d out of range

The specified arc index is negative or greater than or equal to the number of arcs in the network.

1251

CPXERR_INDEX_NOT_BASIC

Index must correspond to a basic variable

The requested variable is not basic.

1252

CPXERR_NEED_OPT_SOLN

Optimal solution required

An optimal solution must exist before the requested operation can be performed.

1253

CPXERR_BAD_STATUS

Invalid status entry %d for basis specification

The basis status values are out of range.

1254

CPXERR_NOT_UNBOUNDED

Unbounded solution required

The requested operation can only be performed on a problem determined to be unbounded.

1255

CPXERR_SBASE_INCOMPAT

Incompatible with superbasis

The requested operation is incompatible with an existing superbasis.

1256

CPXERR_SINGULAR

Basis singular

CPLEX cannot factorize a singular basis. See the discussion of numerical difficulties in the CPLEX User's Manual.

1257

CPXERR_PRIIND

Incorrect usage of pricing indicator

Pricing indicator value out of range.

1258

CPXERR_NO_LU_FACTOR

No LU factorization exists

The requested item requires the presence of a factorization. You may need to optimize with a 0 iteration limit to get a factorization.

1260

CPXERR_NO_SENSIT

Sensitivity analysis not available for current status

Sensitivity information is not available because an optimal basic solution does not exist for the currently loaded problem. Optimize the problem checking to ensure that it is not infeasible or unbounded.

1261

CPXERR_NO_BASIC_SOLN

No basic solution exists

The requested operation requires the existence of a basic solution. Apply primal or dual simplex or crossover.

1262

CPXERR_NOBASIS

No basis exists

The requested operation requires the existence of a basis.

1263

CPXERR_ABORT_STRONGBRANCH

Strong branching aborted

Strong branching, for variable selection, could not proceed because a subproblem optimization was aborted.

1264

CPXERR_NO_NORMS

No norms available

Norms not present. Change pricing and call the optimization routine.

1265

CPXERR_NOT_DUAL_UNBOUNDED

Dual unbounded solution required

The called function requires that the LP stored in the problem object has been determined to be primal infeasible by the dual simplex algorithm.

1266

CPXERR_TILIM_STRONGBRANCH

Time limit reached in strong branching

Strong branching was not completed due to reaching the time limit.

1267

CPXERR_BAD_PIVOT

Illegal pivot

This occurs if illegal or bad Simplex pivots are attempted. Examples are trying to remove nonbasic variables from the basis or selecting a zero column to enter the basis. Also, this error code may be generated if a pivot would yield a numerically unstable or singular basis.

1268

CPXERR_TILIM_CONDITION_NO

Time limit reached in computing condition number

Condition number computation was not completed due to reaching the time limit.

1269

CPXERR_ABORT_CONDITION_NO

Condition number computation aborted

The computation of Kappa was terminated early, due to a user interrupt or other reason.

1292

CPXERR_BAD_METHOD

Invalid choice of optimization method

Unknown method selected for CPXhybnetopt() or CPXhybbaropt(). Select CPX_ALG_PRIMAL or CPX_ALG_DUAL.

1421

CPXERR_NO_FILENAME

File name not specified

A filename must be specified for the requested operation to succeed.

1422

CPXERR_FAIL_OPEN_WRITE

Could not open file '%s' for writing

CPLEX could not create the specified file. Check the file specification.

1423

CPXERR_FAIL_OPEN_READ

Could not open file '%s' for reading

CPLEX could not read the specified file. Check the file specification.

1424

CPXERR_BAD_FILETYPE

Invalid filetype

Invalid file type passed to routine requiring a file type

1431

CPXERR_TOO_MANY_ROWS

Too many rows

The problem contains more rows than are allowed.

1432

CPXERR_TOO_MANY_COLS

Too many columns

The problem contains more columns than are allowed.

1433

CPXERR_TOO_MANY_COEFFS

Too many coefficients

The problem contains more matrix coefficients than are allowed.

1434

CPXERR_BAD_NUMBER

Line %d: Couldn't convert '%s' to a number

CPLEX was unable to interpret a string entry as a number on the indicated line.

1435

CPXERR_BAD_EXPO_RANGE

Line %d: Exponent '%s' out of range

An exponent on the indicated line is greater than the largest permitted for your computer system.

1436

CPXERR_NO_OBJ_SENSE

Max or Min missing

The objective function sense indicator is missing from the LP file. No problem is read.

1441

CPXERR_NO_NAME_SECTION

Line %d: No NAME section

The required MPS file NAME section is missing.

1442

CPXERR_BAD_SOS_TYPE

Line %d: Unrecognized SOS type: %c%c

Only SOS Types S1 or S2 can be specified within an SOS or MPS file.

1443

CPXERR_COL_ROW_REPEATS

Column '%s' has repeated row '%s'

The indicated column appears more than once in a row. Check the MPS file for duplicate entries.

1444

CPXERR_RIM_ROW_REPEATS

%s '%s' has repeated row '%s'

The MPS file contains duplicate row names.

1445

CPXERR_ROW_REPEATS

Row '%s' repeats

The MPS problem contains duplicate row entries. Inspect and edit the file.

1446

CPXERR_COL_REPEATS

Column '%s' repeats

The MPS problem file contains duplicate column entries. Inspect and edit the file.

1447

CPXERR_RIM_REPEATS

Line %d: %s '%s' repeats

The MPS file contains duplicate names.

1448

CPXERR_ROW_UNKNOWN

Line %d: '%s' is not a row name

The MPS file specifies a row name that does not exist.

1449

CPXERR_COL_UNKNOWN

Line %d: '%s' is not a column name

The MPS file specifies a column name that does not exist.

1453

CPXERR_NO_ROW_SENSE

Line %d: No row sense

No sense indicator was found on the indicated line.

1454

CPXERR_EXTRA_FX_BOUND

Line %d: 'FX' bound type illegal when prior bound given

A column with either an upper or lower bound previously assigned has an illegal FX bound assignment. Since the FX bound type fixes both upper and lower bounds, no additional bounds can be specified. Check the MPS file.

1455

CPXERR_EXTRA_FR_BOUND

Line %d: 'FR' bound type illegal when prior bound given

A column with an upper or lower bound previously assigned has an illegal FR bound assignment. Since the FR bound type has neither an upper nor lower bound, no other bound type can be specified. Check the MPS file.

1456

CPXERR_EXTRA_BV_BOUND

Line %d: 'BV' bound type illegal when prior bound given

Check the MPS file for bound values which conflict with this type specification.

1457

CPXERR_BAD_BOUND_TYPE

Line %d: Unrecognized bound type '%s'

An unrecognized bounds sense indicator appears in the MPS file. Acceptable bound senses are BV, LI, UI, UP, LO, FX, FR, MI, PL, and SC.

1458

CPXERR_UP_BOUND_REPEATS

Line %d: Repeated upper bound

The upper bound for a column is repeated within the problem file on the indicated line. Two individual upper bounds could exist. Alternately, a PL bound and individual bound could be in conflict. Check the MPS file.

1459

CPXERR_LO_BOUND_REPEATS

Line %d: Repeated lower bound

The lower bound for a column is repeated within the problem file on the indicated line. Two individual lower bounds could exist. Alternately, an MI bound and individual lower bound could be in conflict. Check the MPS file.

1460

CPXERR_NO_BOUND_TYPE

Line %d: Bound type missing

No bound type could be found for the indicated column bound on the indicated line. Check the MPS file.

1461

CPXERR_NO_QMATRIX_SECTION

Line %d: No QMATRIX section

The required QMATRIX section for quadratic programs is missing from the QP file. Check the file.

1462

CPXERR_BAD_SECTION_ENDATA

Line %d: Unrecognized section indicator. Expecting ENDATA

An unrecognized MPS file section indicator after the COLUMNS section of the MPS file.

1463

CPXERR_INT_TOO_BIG_INPUT

Line %d: Magnitude exceeds integer limit

A number has been read that is larger than the biggest integer value that can be represented by the computer.

1464

CPXERR_NAME_TOO_LONG

Line %d: Identifier/name too long to process

The length of the identifier or name was beyond the size CPLEX can process.

1471

CPXERR_NO_ROWS_SECTION

Line %d: No ROWS section

No ROW section was found in the MPS file.

1472

CPXERR_NO_COLUMNS_SECTION

Line %d: No COLUMNS section

The required COLUMNS section is missing from the MPS file. Check the file.

1473

CPXERR_BAD_SECTION_BOUNDS

Line %d: Unrecognized section indicator. Expecting RANGES, BOUNDS, QMATRIX, or ENDATA

An unrecognized MPS file section indicator after the COLUMNS section of the MPS file.

1474

CPXERR_RANGE_SECTION_ORDER

Line %d: 'RANGES' section out of order

The RANGES section can only appear after the RHS section in an MPS file.

1475

CPXERR_BAD_SECTION_QMATRIX

Line %d: Unrecognized section indicator. Expecting QMATRIX or ENDATA

An unrecognized MPS file section indicator after the RHS or BOUNDS section of the MPS file.

1476

CPXERR_NO_OBJECTIVE

Line %d: No objective row found

No free row was found in the MPS file. Check the file. At least one free row must be present. Free rows have an 'N' sense beginning in column 2.

1477

CPXERR_ROW_REPEAT_PRINT

%d Row repeats messages not printed

The MPS problem or REV file contains duplicate row entries. Inspect and edit the file.

1478

CPXERR_COL_REPEAT_PRINT

%d Column repeats messages not printed

The MPS problem or REV file contains duplicate column entries. Inspect and edit the file.

1479

CPXERR_RIMNZ_REPEATS

Line %d: %s %s repeats

The MPS file contains duplicate entries in an extra rim vector.

1480

CPXERR_EXTRA_INTORG

Line %d: 'INTORG' found while reading integers

Integer markers are incorrectly positioned in the MPS file.

1481

CPXERR_EXTRA_INTEND

Line %d: 'INTEND' found while not reading integers

Integer markers are incorrectly positioned in the MPS file.

1482

CPXERR_EXTRA_SOSORG

Line %d: 'SOSORG' found while reading a SOS

SOS markers are incorrectly positioned in the MPS file.

1483

CPXERR_EXTRA_SOSEND

Line %d: 'SOSEND' found while not reading a SOS

SOS markers are incorrectly positioned in the MPS file.

1484

CPXERR_TOO_MANY_RIMS

Too many rim vectors

Reset the rim vector read limit to a larger number.

1485

CPXERR_TOO_MANY_RIMNZ

Too many rim nonzeros

Reset the rim vector nonzero read limit to a larger number.

1486

CPXERR_NO_ROW_NAME

Line %d: No row name

A row name is missing within the ROWS section.

1487

CPXERR_BAD_OBJ_SENSE

Line %d: Unrecognized objective sense '%s'

There is an OBJSENSE line in an MPS problem file, but CPLEX can not locate the MIN or MAX objective sense statement. Check the MPS file for correct syntax. See the CPLEX User's Manual for a description of MPS format.

1530

CPXERR_NET_DATA

Inconsistent network file

Check the NET format file for errors.

1531

CPXERR_NOT_MIN_COST_FLOW

Not a min-cost flow problem

Check the MIN format file for errors.

1532

CPXERR_BAD_ROW_ID

Incorrect row identifier

Selected row does not exist.

1537

CPXERR_BAD_CHAR

Illegal character

Character not allowed. See NET or MIN format descriptions.

1538

CPX_NET_FILE_SHORT

Unexpected end of network file

Check the NET format file for errors.

1550

CPXERR_BAS_FILE_SHORT

Basis missing some basic variables

Number of basic variables is less than the number of rows.

1551

CPXERR_BAD_INDICATOR

Line %d: Unrecognized basis indicator '%s'

An invalid basis indicator appears in the BAS file.

1552

CPXERR_NO_ENDATA

'ENDATA' missing

BAS files must have an ENDATA record as the last line of the file.

1553

CPXERR_FILE_ENTRIES

Line %d: Wrong number of entries

The BAS or VEC file contains a line with too many entries.

1554

CPXERR_SBASE_ILLEGAL

Superbases are not allowed

Basis or restart file contains superbasis that cannot be read.

1555

CPXERR_BAS_FILE_SIZE

%d %s basic variable(s)

Number of basic variables doesn't match the problem. Check CPXcopybase() call.

1556

CPXERR_NO_VECTOR_SOLN

Vector solution does not exist

Could not write VEC file because no vector solution is available.

1560

CPXERR_NOT_SAV_FILE

File '%s' is not a SAV file

The selected file does not match the type specified.

1561

CPXERR_SAV_FILE_DATA

Not enough data in SAV file

The file is corrupted or was generated by an incompatible version of the software.

1562

CPXERR_SAV_FILE_WRITE

Unable to write SAV file to disk

CPLEX could not open or write to the requested SAV file. Check the file designation and disk space.

1563

CPXERR_FILE_FORMAT

File '%s' has an incompatible format. Try setting 'reverse' flag

When reading a binary file produced on a different computer system, setting the reverse byte ordering may allow reading.

1602

CPXERR_ADJ_SIGNS

Lines %d,%d: Adjacent signs

The previous line ended with a "+" or a "-" and that the subsequent line must start with a variable name rather than an operator.

1603

CPXERR_RHS_IN_OBJ

Line %d: RHS sense in objective

The objective row erroneously includes a sense indicator.

1604

CPXERR_ADJ_SIGN_SENSE

Lines %d,%d: Adjacent sign and sense

A sense indicator erroneously follows an arithmetic operator.

1605

CPXERR_QUAD_IN_ROW

Line %d: Quadratic term in constraint

Quadratic terms are allowed only in the objective function.

1606

CPXERR_ADJ_SIGN_QUAD

Lines %d,%d: Adjacent sign and quadratic character

The previous line ended with a "+" or a "-" and that the subsequent line must start with a variable name rather than an one of the reserved quadratic characters []*^.

1607

CPXERR_NO_OPERATOR

Line %d: Expected '+' or '-', found '%c'

Some character other than '+' or '-' appears between variable names on the indicated line.

1608

CPXERR_NO_OP_OR_SENSE

Line %d: Expected '+','-' or sense, found '%c'

Some character other than a + or - operator, as required, appears on the indicated line.

1609

CPXERR_NO_ID_FIRST

Line %d: Expected identifier first

A variable name is missing on the indicated line.

1610

CPXERR_NO_RHS_COEFF

Line %d: Expected RHS coefficient

No RHS coefficient is present after the sense indicator on the indicated line.

1611

CPXERR_NO_NUMBER_FIRST

Line %d: Expected number first

Some character other than a number, as required, appears on the indicated line.

1612

CPXERR_NO_QUAD_EXP

Line %d: Expected quadratic exponent

An exponent of 2 is expected after the ^ operator

1613

CPXERR_QUAD_EXP_NOT_2

Line %d: Quadratic exponent must be 2

Only an exponent of 2 is allowed after the exponentiation operator ^.

1614

CPXERR_NO_QP_OPERATOR

Line %d: Expected ^ or *

The ^ or * operator is missing from the QP term.

1615

CPXERR_NO_NUMBER

Line %d: Expected number, found '%c'

Some character other than a number, as required, appears on the indicated line.

1616

CPXERR_NO_ID

Line %d: Expected identifier, found '%c'

Instead of the expected identifier CPLEX found the character shown.

1617

CPXERR_BAD_ID

Line %d: '%s' not valid identifier

An illegal variable or row name exists on the indicated line.

1618

CPXERR_BAD_EXPONENT

Line %d: Exponent '%s' not %s with number

The characters following an exponent on the indicated line are not numbers.

1619

CPXERR_Q_DIVISOR

Line %d: Missing or incorrect divisor for Q terms

Quadratic terms must be enclosed in square brackets and followed by a divide sign with divisor 2, i.e., [ ]/2.

1621

CPXERR_NO_BOUND_SENSE

Line %d: No bound sense

The sense indicator is missing on the indicated line.

1622

CPXERR_BAD_BOUND_SENSE

Line %d: Invalid bound sense

An invalid bounds sense indicator appears in the LP file. Acceptable bound senses are "<", ">", "=", or "free".

1623

CPXERR_NO_NUMBER_BOUND

Line %d: Missing bound number

The bound data is missing from the LP file. CPLEX expected a number where no number was found.

1624

CPXERR_LP_TOO_MANY_ROWS

Line %d: More than %d constraints

Extra space is insufficient. Increase extra space using read limits.

1625

CPXERR_LP_TOO_MANY_COLS

Line %d: More than %d variables

Extra space is insufficient. Increase extra space using read limits.

1626

CPXERR_LP_TOO_MANY_COEFFS

Line %d: More than %d coefficients

Extra space is insufficient. Increase extra space using read limits.

1627

CPXERR_NO_SOS_SEPARATOR

Expected ':', found '%c'

The separator "::" must follow the S1 or S2 declaration.

1650

CPXERR_INVALID_NUMBER

Number not representable in exponential notation

The number to be printed is not representable.

1701

CPXERR_IIS_NO_INFO

No IIS information exists

The IIS algorithm found no IIS sets, so the routine CPXgetiis() fails. Callable Library users see this message if CPXgetiis() or CPXdisplayiis() is called before computing the IIS.

1702

CPXERR_IIS_NO_SOLN

No solution exists; infeasibility analysis not available

The requested command cannot be executed because no solution exists for the problem. Optimize the problem first.

1703

CPXERR_IIS_FEAS

Problem is feasible; no IIS available

The problem solved with indication of numerical uncertainty. It may be feasible.

1704

CPXERR_IIS_NOT_INFEAS

Problem may be feasible; no IIS available

The problem solved with indication of numerical uncertainty. It may be feasible.

1705

CPXERR_IIS_OPT_INFEAS

Problem optimal with unscaled infeasibilities. No IIS available

The problem solved with only unscaled infeasibilities. The IIS algorithm cannot be applied.

1706

CPXERR_IIS_DEFAULT

Unable to compute an IIS

The problem solved with indication of numerical uncertainty. It may be feasible.

1707

CPXERR_IIS_NO_BASIC

Infeasibility Finder requires a basic solution

Primal or dual simplex or crossover from a barrier solution must first be used prior to applying the IIS algorithm.

1708

CPXERR_IIS_NO_PRIMAL

Infeasibility Finder requires a primal infeasible basis

An IIS can be determined only if a primal method finds the problem to be primal infeasible.

1709

CPXERR_IIS_NO_LOAD

Failed to load IIS subproblem

Most likely there is insufficient memory to perform the IIS analysis.

1710

CPXERR_IIS_SUB_OBJ_LIM

Objective limit reached on IIS subproblem

Indicated limit hit during the solution of a subproblem.

1711

CPXERR_IIS_SUB_IT_LIM

Iteration limit reached on IIS subproblem

Indicated limit hit during the solution of a subproblem.

1712

CPXERR_IIS_SUB_TIME_LIM

Time limit reached on IIS subproblem

Indicated limit hit during the solution of a subproblem.

1713

CPXERR_IIS_NUM_BEST

Unable to optimize IIS subproblem

Status of subproblem optimization is unknown due to numerical uncertainty. Check scaling of problem.

1801

CPXERR_WORK_FILE_OPEN

Could not open temporary file

CPLEX was unable to access a temporary file in the directory specified by CPX_PARAM_WORKDIR.

1802

CPXERR_WORK_FILE_READ

Failure on temporary file read

CPLEX was unable to read a temporary file in the directory specified by CPX_PARAM_WORKDIR.

1803

CPXERR_WORK_FILE_WRITE

Failure on temporary file write

CPLEX was unable to write a temporary file in the directory specified by CPX_PARAM_WORKDIR.

3002

CPXERR_BOUNDS_BINARY

Binary variable '%s' has value outside [0,1]

The referenced variable, type binary, has been assigned bounds outside of 0 and 1. Change the bounds to 0 and 1.

3003

CPXERR_NOT_MIP

Not a mixed-integer problem

The requested operation can only be performed on a mixed integer problem.

3004

CPXERR_SOS_BOUNDS

Infeasible bounds for set number %d

An SOS exists with variable having upper or lower bounds such that no feasible solution exists.

3006

CPXERR_BAD_PRIORITY

Negative priority entry %d

Priority orders must be positive integer values.

3007

CPXERR_ORDER_BAD_DIRECTION

Illegal direction entry %d

Legal direction entries are limited to the values CPX_BRANCH_GLOBAL, CPX_BRANCH_DOWN, and CPX_BRANCH_UP.

3009

CPXERR_ARRAY_BAD_SOS_TYPE

Illegal sostype entry %d

Only sostype values of 1 or 2 are legal.

3010

CPXERR_UNIQUE_WEIGHTS

Set does not have unique weights

SOS weights must be unique.

3011

CPXERR_BOUNDS_INT

Non-integral %s bound value %g for integer column '%s'

Check to be sure that bounds for integer variables have integer values.

3012

CPXERR_BAD_DIRECTION

Line %d: Unrecognized direction '%c%c'

Only UP and DN are accepted as branching directions beginning in column 2 of an ORD file.

3015

CPXERR_NO_SOS

No user-defined SOSs exist

SOS information can be written to a file only if already defined. SOS Type 3 information (found using the SOSSCAN feature) cannot be written to an SOS file.

3016

CPXERR_NO_ORDER

No priority order exists

The requested command cannot be executed because no priority order has been loaded.

3017

CPXERR_NO_INT_SOLN

No integer feasible solution exists

An integer feasible solution must exist before the requested operation can be performed.

3018

CPXERR_INT_TOO_BIG

Magnitude of variable %s: %g exceeds integer limit

CPXmipopt() tried to branch on the indicated integer variable at a value larger than representable in the branch-and-bound tree. Check model formulation.

3019

CPXERR_SUBPROB_SOLVE

Failure to solve MIP subproblem

CPXmipopt() failed to solve one of the subproblems in the branch-and-bound tree. This can be due to a limit (for example, an iteration limit) or numerical trouble. Check the log, or add a call to CPXgetsubstat() (in the Callable Library) for information on the cause.

3020

CPXERR_NO_MIPSTART

No MIP start exists

CPXgetmipstart() failed because no MIP start data is available for the problem.

3021

CPXERR_BAD_CTYPE

Illegal ctype entry %d

An illegal ctype character has been passed to CPXchgctype(). Use one of 'C', 'B', 'I', `S' or `N'.

3022

CPXERR_SEMI_BDS

Infinite bds on semi-continuous or semi-integer variable %d

Semi-continuous or semi-integer variables must have finite bounds.