> PS: here is a small log of both problems > > GLPK Simplex Optimizer, v4.47 > 191255 rows, 68860 columns, 450946 non-zeros > 0: obj = 0.000000000e+000 infeas = 5.436e+009 (28783) > ... > 17761: obj = -8.927238865e+008 infeas = 2.030e+007 (14520) > PROBLEM HAS NO FEASIBLE SOLUTION > > Elasticity > Addtional constraints 220038 for 191255 rows > Current column size is 68860 > Additional Constraints 220038 > Current column size after resize is 288898 > GLPK Simplex Optimizer, v4.47 > 191255 rows, 288898 columns, 642201 non-zeros > 0: obj = 0.000000000e+000 infeas = 5.436e+009 (28783) > ... > * 1552: obj = 0.000000000e+000 infeas = 1.490e-008 (28782) > OPTIMAL SOLUTION FOUND > Sinf is 0
BTW, in the second case the objective (Sinf, I guess) is zero on all iterations. Probably you forgot to assign objective coefficients to elastic variables. _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
