> Thanks, I changed it and I can kind of reproduce glpsol's behaviour, > but now I pinpointed the problem to this LP: > http://www.mimuw.edu.pl/~mucha/lpQ_bad.txt > glpsol --cpxlp lpQ_bad.txt > give UNBOUNDED solution here. However, both > glpsol --std --cpxlp lpQ_bad.txt > and > glpsol --adv --cpxlp lpQ_bad.txt > which is kind of weird.
Probably this happens because your instance is not well conditioned, so due to excessive round-off errors the presolved lp is unbounded while the original lp is not. > Also neither lpx_adv_basis nor lpx_std_basis > seem to solve the problem from C++ API level. Could anyone please tell > me what I am missing here? Could you provide the code returned by glp_simplex? _______________________________________________ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk
