Re: [Help-glpk] OPB output file anomaly

[Andrew Makhorin]

The point is that mps file does not provide information about the
objective; instead that the first free row is used as the objective
by default. Once mps file has been read by glpk routine, coefficients
of the first free row are stored as objective coefficients, however,
that free row is also kept in the instance. Thus, writing the
objective row would produce two identical rows in output mps file.
That's why glpk routine does not write the objective row by default if
there is a free row in the instance.