Hi Xypron, C:\>>glpsol.exe --dfs --nopresol -m s.mod
> gave the following output > GLPSOL: GLPK LP/MIP Solver 4.39 > Reading model section from s.mod... > 132 lines were read > Generating start... > Generating end... > Generating onemove... > Generating delta... > Model has been successfully generated > ipp_basic_tech: 66 row(s) and 66 column(s) removed > ipp_reduce_bnds: 1 pass(es) made, 0 bound(s) reduced > ipp_basic_tech: 0 row(s) and 0 column(s) removed > ipp_reduce_coef: 1 pass(es) made, 0 coefficient(s) reduced > glp_intopt: presolved MIP has 1054 rows, 3346 columns, 11404 non-zeros > glp_intopt: 2356 integer columns, all of which are binary > Scaling... > The output was just the same if --presol is specified. > I would have expected no column to be removed with --nopresol. '--nopresol' disables the lp presolver; to disable the mip preprocessor you should specify '--nointopt'. PS: Thank you for your activity on the help-glpk list. _______________________________________________ Bug-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/bug-glpk
