David Torres Sanchez

This is a pretty large problem. Upgrading your machine might help. How long does presolve take? You might want to limit this with PrePasses=1 then go straight into NoRel by setting NoRelHeurTime to...

Thanks Riley! I created python-mip#398 to track this. Cheers, David

Hi Cord, Thanks for the feedback, I will pass this on as well. Cheers, David

I guess potentially our next release, we try to keep up with the Python release cycle. I will double-check. Confirmed, we will build Python 3.13 wheels for Gurobi version 12.0.1. Cheers, David

Hi Cord, That is good question. I guess potentially our next release, we try to keep up with the Python release cycle. I will double-check. In this case I think Python 3.13 was a quite close to our...

Hi Adrian, Gurobi version 12.0 has been released. This includes a fix for the difference in the solutions when using IntegralityFocus=1. I have just tested again, there are some numerical differenc...

Hi Julian, We have released Gurobi 12.0 which includes a fix for this bug. I have already tested it again on this model but please feel free to download and test it. Cheers, David

Hi, Quadratic equality constraints are non-convex.Can you have a go with the most recent version (12.0.0)? Cheers, David

Hi Nick, You can add a list of vtypes: x = m.addVars(3, vtype=[GRB.BINARY]*2 + [GRB.CONTINUOUS]) Cheers, David

Hi, I think it's just scaling the whole "Labor" constraint by dividing all coefficients by 100. The same results are obtained if you remove the scaling. Cheers, David