[Bug-glpk] glpsol fails to parse a cplex lp file containing constraints that evaluate to zero

[Christophe-Marie Duquesne]

Hi,

Running glpsol on the attached file fails:

 > glpsol --cpxlp debug.lp
GLPSOL: GLPK LP/MIP Solver, v4.43
Parameter(s) specified in the command line:
 --cpxlp debug.lp
Reading problem data from `debug.lp'...
debug.lp:6: missing variable name
CPLEX LP file processing error

Reading some documentation about the cplex lp format [1], I did not
find something that forbids to but "0<=0" constraints, so I am filing
a bug here. Pardon me if I am wrong.
FYI, cbc does not fail on it, which made me suspect a bug in glpsol,
but nothing proves they are right.

[1] http://lpsolve.sourceforge.net/5.5/CPLEX-format.htm

Best regards,
Christophe-Marie Duquesne

debug.lp
Description: Binary data