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Incorrect MIP Optimality

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  • 正式なコメント
    Simranjit Kaur
    • Gurobi Staff Gurobi Staff
    This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
  • 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?

     

    0
  • Anian Ruoss
    • Gurobi-versary
    • First Comment
    • First Question

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

    0
  • 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?

    0
  • 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. 

    0
  • 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.

    0

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