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Re: [Help-glpk] error's meaning
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From: |
Andrew Makhorin |
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Subject: |
Re: [Help-glpk] error's meaning |
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Date: |
Thu, 10 Nov 2011 19:43:49 +0300 |
> I'm trying to solve an MILP program with glpsol and i would like to
> know what the following error means, please.
>
> OPTIMAL SOLUTION FOUND
> integer optimization begins ...
> + 224: mip = not found yet <= +inf (1;0)
> + 441: >>>>> 5.484999986e+00 <= 2.000000039e+08 (18;1)
> Assertion failed: q!=0
> Error detected in file glpspx02.c at line 1698
> Abandon
It is a rare bug in the dual simplex solver. Could you please output
your mip with --wfreemps or --wglp option and post it to me? Thanks.
You may try to bypass this bug by specifying --cbg or --cgr option.