How can I disable Crossover in my specific case

回答済み

Houssem Eddine KAFI

2023年03月14日 17:14

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Hello, I am new to the field of optimization and I recently started using Gurobi for my studies. I am currently working on a modeling language called GBOML which uses optimization tools such as Gurobi. The call is made with the following command line which is applied on the anaconda prompt:

(base) E:\>gboml E:\...\...directory to the GBOML text file\...txt --gurobi --json --output resullts_file

This seems to be the parameters of the function gboml:

The problem I am facing is that for the past 2 days, the solution time is taking longer and longer (up to one hour) even though I can see in the anaconda prompt that a solution has been found. After reading several other posts, I understood that the solution was to disable the Crossover option (crossover=1), but I don't know how to do it in my case where the only command line I have is the one I described to you earlier.

This is what I receive when I launch the optimization:

Thank you for your help.

関連

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  Eli Towle

  • Gurobi Staff

  2023年03月14日 17:31

  Note that you would set the Crossover parameter to 0 (not 1) to disable crossover.

  According to the GBOML documentation, you can add Gurobi parameters to a file named \(\texttt{gurobi.opt}\) (this is referenced in your screenshot), then pass that file to the GBOML command-line interface via \(\texttt{--opt gurobi.opt}\). In your case, the \(\texttt{gurobi.opt}\) file would contain the single line

  Crossover 0

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  Houssem Eddine KAFI

  2023年03月15日 08:45

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  Thank you Eli Towle ! It works just fine ! 

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