> I spent long time to fix this error, but still failed. > spx_invert: the basis matrix is singular > spx_simplex: numerical problems with basis matrix > spx_simplex: sorry, basis recovery procedure not implemented yet > bfd_ftran: the factorization is not valid
> Part of the code is shown as followed. The purpose is to find out > the projection of the solution space of the problem on two dimensional > space. The method is optimize the linear function of these two > variable. Thus, the coefficients of the objective function changed > every loop. Could you please include the following two statements: lpx_write_cpxlp(lp, "foo.lp"); lpx_print_sol(lp, "foo.sol"); immediately before a call to lpx_simplex that fails. This would allow inspecting the instance and the current basis and possibly might explain the cause of failure. _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
