Hi, I encountered an error solving a medium-sized MIP (see attached file x3.mod). Using the standard options, glpk reports the attached problem to have no feasible solution, though it has by construction as well as according to a number of other LP solvers, namely lpsolve, CPLEX 10, COIN clp. Using either the interior point option or the --nopresol option, glpk finds the correct solution.
The error does not seem to be related to the integer part, as it occurs in the relaxed problem (option --nomip) as well. Cheers, Ingo _______________________________________________ Bug-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/bug-glpk
