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Re: [Bug-glpk] Crash in 4.38


From: Andrew Makhorin
Subject: Re: [Bug-glpk] Crash in 4.38
Date: Fri, 3 Jul 2009 16:41:38 +0300

> I'm running 4.38 on winXP (inside a VM on top of Mac OS 10.5). When I
> try to optimize the attached file I get the following error:

> Assertion failed: xlcmp(env->t_last, t) <= 0
> Error detected in file ..\src\glplib10.c at line 109

> The attached file is the smallest example I constructed that fails.
> The few that I tried smaller than this worked.  Of course, this
> problem is tiny compared to what I'd really like to run.

Thank you for your bug report.

The error appears in the internal timer routine (xtime), and it is
not related to the instance you are solving. It appears, because
the timer value determined by the routine happens to be less than
its value in the past.

Does the error happen regularly or randomly? On which platform are
you running glpk?


Andrew Makhorin





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