David Torres Sanchez

Turning this into an internal ticket to better track this request.Cheers, David

Hi Zohar,If your matrix is totally unimodular you should be able to relax integrality restrictions (binary variables are just continuous between 0 and 1) and still have an integer solution.Cheers, ...

Related: How to terminate a Linear program once i get a desired difference(say 1) between primal and dual solution?

Hi Laura,This is interesting!Are you using a laptop? If so, are you using a docking station?Cheers, David

Hi Alessandra, Is there a possibility the next opt process "turn off" the setting of time_limit?  You can do // Set a 2 second time limitm->set(GRB_DoubleParam_TimeLimit, 2);m->optimize();// Do y...

Cross-posted from: How to terminate a Linear program once i get a desired difference(say 1) between primal and dual solution?

To retrieve the solution using this callback with a custom stopping criterion, set the Crossover parameter to 0.Cheers, David

Hi Rihot, You are right, as far as I can tell the time window constraints are fine. Looks like these: $$u_{ik} +s_i + t_{ij} - u_{jk} \leq M(1-x_{ijk})~~\forall (i,j)$$ With \(M=1000\).Maybe try co...

Hi Ishit,If you can stick with Barrier (Method = 2), you can try BarConvTol, or more generally using OptimalityTol.You can check out more Parameters.For more fine control you can use a callback. Se...

Hi Hongyu,Have you tried the parameters suggested in Solver parameters to manage numerical issues?e.g. Aggregate = 0 or Presolve = 0.Also, as mentioned the article linked, you could try changing th...