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[Bug-glpk] (none)

From: Ingo Thomas
Subject: [Bug-glpk] (none)
Date: Wed, 18 Jul 2007 21:19:23 +0400


I encountered an error solving a medium-sized MIP (see attached file
x3.mod). Using the standard options, glpk reports the attached problem
to have no feasible solution, though it has by construction as well as
according to a number of other LP solvers, namely lpsolve, CPLEX 10,
COIN clp. Using either the interior point option or the --nopresol
option, glpk finds the correct solution.

The error does not seem to be related to the integer part, as it
occurs in the relaxed problem (option --nomip) as well.

Cheers, Ingo

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