Forum Discussion
QCQP model doomed infeasible in presolve, however it is not
Hi, I am trying to solve a QCQP model, which is doomed infeasible by the pre-solver. However, when solving with presolve deactivated it solves fine - just takes a very long time! Calling the IIS doe...
Hi Chris,
I'm using exportProb, however added the loadMat before calling exportProb just to be sure.
I have attached the .mps and .svf files. I've tried to do a IIS on the .mps file but it just stalls at "Applying the Deletion Filter".
Also, I have attached our code wrapping the XPRESS solver so you can see how we interact with XPRBprob and XPRSprob.
Just to add som context: The flow is not new and works in general, however we sometimes see this issue when solving the QCQP. We have an old version of Cplex also implemented for this flow, and it does not fail in the QCQP like the XPRESS Optimizer.