Re: [Bug-glpk] (no subject)

[Andrew Makhorin]

> Why does glp_prob_name(tree) not return the same
> pointer as the one passed to glp_int_opt?

Because you enabled the mip presolver (iocp.presolve = GLP_ON) in
which case glp_intopt created an internal glp_prob object corresponding
to a presolved mip. This is explained in the reference manual.

> Please, change the code to provide the problem name
> in the call back function.

It would be possible to copy symbolic names from the original problem
object, however, it does not have much sense, because the presolved mip
may significantly differ from the original one. Probably there must be
a flag in glp_iocp indicating which names to copy.