> glpsol --cpxlp debug.lp
GLPSOL: GLPK LP/MIP Solver, v4.43
Parameter(s) specified in the command line:
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 , 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.