David Torres Sanchez

Hi Martin, Is the heuristic only there to improve speeds, or does it change optimization overall, then? Indeed, the partition heuristic is just there to improve incumbent solutions and performanc...

For reference see: Discourse (example and hack). Gurobi.jl#19 (to track fix) Cheers, David

Hi Vijay, I have turned this into a ticket. Cheers, David

Hi Goran, Can you try writing the MPS/LP file from Pyomo and then using the Gurobi command to compute the IIS?I don't know enough about Pyomo to understand why your approach doesn't work. gurobi_cl...

Hi Brannon, Each variable has a VBasis attribute with values: 0 (basic), -1 (non-basic at lower bound), -2 (non-basic at upper bound), and -3 (super-basic). Each linear constraint has CBasis attr...

Hi Jiajie,Please see the following similar community post.Cheers, David

Hi Zhizhen, The error comes from the bounds of the resulting sin variables, the ones containing \(\texttt{out}\).The constraints imply these variables must be negative, but the default LB of a vari...

Hi Jacob, I will try the parameters (again - it seems like a constant game of enabling and disabling parameters...) and see if it helps. Reformulating the problem to avoid large coefficient range...

Hi Jacob,This looks like a perfect example of a model with bad numerics (no warnings, but it is a very big model).I'd first recommend upgrading to the latest version (10.0.1).If the problem persist...

Hi Nicolai,DualReductions affects presolve.You are also setting different presolve parameters (Presolve + PreSparsify).I would suggest removing these parameters as well as DualReductions, the model...