Gurobi optimizer returned dramatically different solutions, with far parted objective values, to my same business model.

[Hongqi Jia]

I have the lp file logged.  The lp model files are mathematically equivalent, meaning the constraints are all the same with some ordering differences, same variables, and same objective functions.  I understand the optimization outcome will not be the same for different reasons (including the order differences, etc).  But I believe it is reasonable to expect that the optimized object value should not very far apart.  Are there anyone else encountered the same issue before?

[Sonja Mars]

Hi,

Can you post the log files? It would be very helpful for us to understand what is exactly going on.

Thanks and best regards,
Sonja


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Dr. Sonja Mars
Gurobi Optimization - Technical Support