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Re: [Help-glpk] Undefined or infeasible solution?
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From: |
Rémy Roy |
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Subject: |
Re: [Help-glpk] Undefined or infeasible solution? |
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Date: |
Wed, 11 Sep 2013 14:04:48 -0400 |
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User-agent: |
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 |
On 11/09/2013 1:45 PM, Andrew Makhorin wrote:
> This may happen when infeasibility is detected by the mip preprocessor
> (not by the mip solver), which _erroneously_ does not change the mip
> solution status, so it remains undefined. In any case, if you see on the
> terminal something like follows:
>
> Preprocessing...
> PROBLEM HAS NO PRIMAL FEASIBLE SOLUTION
>
> it means that no integer feasible solution exists.
>
I'm using GLPK with the third party library pulp. Does it means that my
third party library should scan the stdout in addition to the solution
file in order to determine the true status of the solution?
Regards,