Forum Discussion
Why Mosel result is not as optimal as Gams result?
Hi, I use both Gams and FICO Mosel to solve the same model, but the result from Mosel is not as optimal as the result from Gams. What might cause this difference? 1. It's a MIP problem 2. Set the ...
If you can post the solver output logs from your runs with GAMS and Mosel, it should be clear why one solver stopped with a different solution than the other. In Mosel you enable solver output using the call 'setparam("XPRS_VERBOSE", true)'.
Did the Xpress-Mosel solve by any chance hit the time limit?
If both solvers declared the problem optimal, are the final solutions at least within the relative MIP gap (defaults to 0.01%) of each other? In the case of the Xpress-Mosel solve, you should also be given a best bound on an optimal solution. Is the GAMS-Cplex solution between the best bound and best solution reported by Xpress?
Best Regards,
Michael
