Hi Heinrich, Thank you for your bug report.
> for the appended model I get the following results with glpk 4.55 on Linux > 64bit: > > $ glpsol -m test.mod > ... > Preprocessing... > PROBLEM HAS NO PRIMAL FEASIBLE SOLUTION > > $ glpsol --nointopt -m test.mod > ... > +356119: mip = 0.000000000e+00 >= tree is empty 0.0% (0; 3059) > INTEGER OPTIMAL SOLUTION FOUND > Time used: 161.6 secs > > The presolver should not influence reported feasiblity. It may happen due to insufficient accuracy in the mip presolver. I will try to inspect your instance more carefully. Andrew Makhorin _______________________________________________ Bug-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/bug-glpk
