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I am using MIP (Mixed Integer Programming) module in Python to solve one of my optimization problems. for some of the scenarios, model returns "ERROR" (OptimizationStatus.ERROR) status after optimization ends.

Is there a way to get more details about why am I getting this status? I tried catching an exceptions putting try/catch but there is no exception.

Any advice/solution on this will be really helpful. Thanks.

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    $\begingroup$ What solver are you using ? And what modeler ? $\endgroup$
    – Kuifje
    Jul 7, 2020 at 17:35
  • $\begingroup$ I am using CBC Solver and I don't know what do you mean when you say modeler? if this could help, I'm using this - from mip import Model $\endgroup$
    – PyPyVk
    Jul 7, 2020 at 21:56
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    $\begingroup$ the python-mip documentation has a contact form at the top, i would ask this question to the developers. I did not found any way to retrieve this information. $\endgroup$
    – user3680510
    Jul 8, 2020 at 13:09

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I looked at the source code and OptimizationStatus.ERROR is returned if Cbc_isAbandoned evaluates to True. I can't see when this is the case but I would say that only occurs when something goes really wrong on a deeper system level. Your best bet would be to ask the developers though as mentioned in a comment above.

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