Re: [Help-glpk] Problem infeasibility

[Andrew Makhorin]

> the situation is the following:
> I've a Mip problem with some binary variables and some fixed
> variables. I created an MPS file to describe problem by using glpk
> library (java interface 4.8) and I used the MPS file generated as
> input file for glpsol...the result is "PROBLEM HAS NO PRIMAL
> FEASIBLE SOLUTION".
> Anyway the problem is not infeasible because if I create the MPS
> file by using Cplex, glpsol find the OPTIMAL SOLUTION..

> Where is the problem and how can I solve it?

The message "Problem has no primal feasible solution" means that lp
relaxation of your mip instance has no solution.

I think you should check your java program which creates the mip
instance.