Dear GAMS users,
I have tried to use bonmin and cplex to solve a MIP, bonmin obtains a better solution than cplex. I also tried Gurobi later, the result is in between. Have you encountered this kind of situation?
If different solvers obtain different solutions,what do you usually do?
Best,
Yalin
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Yalin,
You make sure that the runs have been done with “Option Optcr = 0, optca = 0;â€. The default is Optcr = 0.1.
Check the manual for OptCR and OptCA.
Good luck
Arne
\
Arne Stolbjerg Drud
ARKI Consulting & Development A/S
Bagsvaerdvej 246A, DK-2880 Bagsvaerd, Denmark
Phone: (+45) 44 49 03 23, email: adrud@arki.dk
From: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] On Behalf Of Yalin Huang
Sent: Friday, October 24, 2014 4:30 PM
To: gamsworld@googlegroups.com
Subject: Bonmin Vs. Cplex
Dear GAMS users,
I have tried to use bonmin and cplex to solve a MIP, bonmin obtains a better solution than cplex. I also tried Gurobi later, the result is in between. Have you encountered this kind of situation?
If different solvers obtain different solutions,what do you usually do?
Best,
Yalin
–
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–
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