Not able to retrieve the objective value even though the model status is optimal.

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rick van Willigen

2023年08月02日 11:38

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Hello everyone,

I am trying to make an genetic algorithm for my thesis. However, when scoring all the new chromosomes of a generation (new values for the decision variables) it gives an error when it try to receive the objective function with: model.getAttr('PoolObjVal') . Even though the model status is 2 (optimal). 

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  David Torres Sanchez

  • Gurobi Staff

  2023年08月02日 11:43

  Hi Rick,

  In Python, you can query the ObjVal attribute as \(\texttt{model.ObjVal}\), not the PoolObjVal, which is only available when looking at a solution pool.

  If you're interested in that, please check the poolsearch.py example.

  Cheers, 
  David

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  rick van Willigen

  2023年08月02日 11:47

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  Ow wow, yes it works now! Thank you very much.

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