> the test code is the same as Rafael posted. I am including it in > attachment. > > > You should be able to compile it with: > > > g++ main.cpp -std=gnu++11 -lglpk >
Thank you. I could reproduce the error using glpk 4.62; it appears due to numerical instability in the dual simplex routine. Please note that replacing four tiny coefficients 4e-12 at x5 by exact zeros in problem.lp allows to solve the instance successfully. Andrew Makhorin _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
