Hi Xypron, > when running glp_simplex on the problem, I get this output: > GLPK Simplex Optimizer, v4.47 > 45 rows, 5 columns, 123 non-zeros > 0: obj = 5.000000000e+00 infeas = 3.750e+01 (0) > 37: obj = 1.400000000e+01 infeas = 8.833e+00 (0) > PROBLEM HAS NO FEASIBLE SOLUTION > > I then used John's coding to write the appended file in CPLEX format. > > glpsol --lp test.lp leads to the following error in the presolver: > > Preprocessing... > Assertion failed: q->lb < q->ub > Error detected in file ..\src\glpnpp03.c at line 556
This diagnostics is not relevant due to floating-point overflow (please see my recent posting to bug-glpk). The glpk code is not intended to work with Inf's and NaN's, so such values completely destroy the program logic. > > I would not have expected such an error. > Andrew Makhorin _______________________________________________ Bug-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/bug-glpk
