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Re: [Bug-glpk] [Fwd: I have a problem with glpk]

From: Andrew Makhorin
Subject: Re: [Bug-glpk] [Fwd: I have a problem with glpk]
Date: Thu, 18 Apr 2013 15:33:25 +0400

> I have use GLPK since several year, and I am very satisfied with it. I
> would like to thank your work!

Thank you for your interest in glpk.

> Recently I discovered a problem. A use standalone version 4.34 on a
> Windows XP


> However the optimal solution to the second problem is a feasible
> solution for the firt problem, so I am confused. Is there something I
> left out of consideration?

This is a known phenomenon which may happen on badly scaled mips,
because all computations are performed in inexact (floating-point)

Could you post me your instance in gzipped mps or cplex format? Thanks.

Andrew Makhorin

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