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Re: [Help-glpk] glp_intopt runs forever (related to Dusan Plavak's issue
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From: |
Andrew Makhorin |
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Subject: |
Re: [Help-glpk] glp_intopt runs forever (related to Dusan Plavak's issue) |
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Date: |
Mon, 12 Jun 2017 17:42:29 +0300 |
> For my setup, the instability appears with pre-release 4.59.2, if this
> is any help.
>
Thanks.
The error appears on solving problem.lp with glpsol, which performs
scaling by default; however, it doesn't appear in main.cpp where scaling
is not used. Specifying tiny constraint coefficients (which normally
should be zeros) is a common error that makes the instance badly
conditioned and leads to numerical difficulties.