How to use computeIIS to find the constraint or the bound that is the source of the infeasibility?

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Hussein Sharadga

2022年12月28日 15:55

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After I use the following command:

m.computeIIS()
m.write("m.ilp")

how to figure out which constraint was the source of the problem? Please see the lip file below: I have a big model and I even do not know where the number 0.0183 comes from

 

Thanks,

Hussein

関連

• Python

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  Jonasz Staszek

  • Community Moderator

  2022年12月28日 16:21

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  Hi Hussein,

  the bound could be due to the presolve - Gurobi might have implied it from the other constraints in your model.

  I recommend that you specify a name for each of your constraints (as described in the documentation). You will then be able to identify the constraint which causes the trouble.

  Best regards
  Jonasz

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