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Incorrect MIP Optimality

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5 comments

  • Jennifer Locke
    Gurobi Staff Gurobi Staff

    Solving these two models on gurobi 8.11 and 9.0 beta,using Gurobi's default parameters, result in the same optimal solution of -6.090196028352e-02.  The original model was found to  have three solutions -0.060902 -0.0550549 -0.00117647, while the modified model resulted in only one solution -0.060902. 

    Are you using any parameters or stopping criteria?

     

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  • Anian Ruoss
    Gurobi-versary
    First Comment
    First Question

    No, but I'm using Gurobi 8.10. Do you think this could explain the difference?

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  • Jennifer Locke
    Gurobi Staff Gurobi Staff

    I tested with 8.10, I see the same results as 8.1.1.  Can you post your log files?

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  • Anian Ruoss
    Gurobi-versary
    First Comment
    First Question

    I upgraded to 8.1.1 and the error disappeared. Do you want me to roll back and post the log files? Otherwise the issue is resolved from my side. 

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  • Jennifer Locke
    Gurobi Staff Gurobi Staff

    I am glad the issues is gone. If you see it again, please resubmit a question with your log files.

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