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Re: [Help-glpk] Infinite cycles


From: Mathieu Dutour
Subject: Re: [Help-glpk] Infinite cycles
Date: Mon, 16 Jan 2017 18:02:00 +0100

Dear Heinrich,

in attachment you can find a problem that runs into
infinite loops for
glpsol -m GLP_buggy_6d21.mod --norelax

and GLPSOL being version 4.61

  Mathieu

On 11 January 2017 at 19:52, Heinrich Schuchardt <address@hidden> wrote:
glpsol -m GLP_buggy.mod  --norelax
runs fine.

glpsol -m GLP_buggy.mod
loops for ever.

I tested with the GLPK 4.61 prerelease.

Best regards

Heinrich Schuchardt

On 01/11/2017 12:14 PM, Mathieu Dutour wrote:
> Dear all,
>
> I obtained some infinite cycles when running the
> glpsol standalone solver on some instances.
> See two files in attachment.
>
> I had the instances of this phenomenon with
> version 4.57 which disappeared with version 4.60.
>
> Is there a way to avoid this phenomenon? I mean
> it is fully acceptable to me to have GLPK report
> that he cannot solve an instance due to numerical
> instability. What is not acceptable is the infinite
> cycles.
>
> Thanks in advance for any help.
> Sincerely,
>
>   Mathieu
>
>
> _______________________________________________
> Help-glpk mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/help-glpk
>


Attachment: GLP_buggy_6d21.mod
Description: audio/mod


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