CPXdperwrite

Description

When solving degenerate linear programs with the dual simplex method, CPLEX may initiate a perturbation of the objective function of the problem in order to improve performance. The routine CPXdperwrite() writes a similarly perturbed problem to a binary SAV format file.

The routine returns a zero on success, and a nonzero if an error occurs.

int CPXdperwrite (CPXCENVptr env, CPXLPptr lp, const char *filename_str, double epsilon);

Arguments

The pointer to the CPLEX environment as returned by CPXopenCPLEX().

A pointer to a CPLEX problem object as returned by CPXcreateprob().

A character string containing the name of the file to which the perturbed LP problem should be written.

The perturbation constant.

status = CPXdperwrite (env, lp, "myprob.dpe", epsilon);