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[Bug-glpk] glpsol cannot solve exported CPLEX file

From: Heinrich Schuchardt
Subject: [Bug-glpk] glpsol cannot solve exported CPLEX file
Date: Fri, 11 Jul 2014 23:20:40 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Icedove/24.5.0

Hello Andrew,

given the following model:

var x, >=0;
minimize obj : x + 5;

I export it with

glpsol -m test.mod --wlp test.lp --check

I get

\* Problem: test *\

 obj: + x
\* constant term = 5 *\

Subject To


Then I run

glpsol --lp test.lp

and receive the following output:

Reading problem data from 'test.lp'...
test.lp:9: missing variable name
CPLEX LP file processing error

The bug is in glpcpx.c. In parse_constraints() the token check should be moved from the end of the loop to the start of the loop.

Best regards

Heinrich Schuchardt

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