Infeasible solution for pywraplp

Eric Yeap

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Apr 8, 2021, 11:10:31 PM4/8/21

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I am using OR-Tools to run a linear programming model (pywraplp) and the solver I am interested in is SCIP.

I notice that, when infeasibility happens, the Spyder will terminate itself as seen in the screenshot below. As a result, the code that follows the OR-Tools model cannot proceed. To run the model again, I have to manually restart the kernel.

Is there any way I can stop this from happening? If the solution is infeasible, I would want it to give me a message and let me continue running the rest of the code.

The OR-Tools version is 8.1.8487.

Laurent Perron

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Apr 9, 2021, 1:11:03 AM4/9/21

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Most likely you are trying to read a solution even if the model is infeasible.

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Eric Yeap

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Apr 9, 2021, 2:53:05 AM4/9/21

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Thank you Laurent for the quick response.

I think I've found the problem resulting in kernel crash. It was due to this line.

I removed it and the kernel won't crash anymore, even though the solution is infeasible.

Eric Yeap

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Apr 9, 2021, 3:09:31 AM4/9/21

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I have another question though. Read somewhere that it is highly recommended to include VerifySolution() in model.

Is it true?

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