Eli Towle

The machine Gurobi is running on is having trouble communicating with our WLS license servers. It could be a DNS or firewall issue. Can you ask the HPC system administrators to investigate why mach...

The behavior you expect is how ObjNAbsTol behaves for multi-objective MIPs. However, this attribute behaves differently for multi-objective LPs. From the documentation:Objective degradations are ha...

Thanks again for reporting this issue. This incorrect declaration of infeasibility/unboundedness is fixed in the recently released Gurobi version 12.0.1.

Does the latest version of Gurobi (12.0.0) also fail to find one of the optimal solutions when setting PoolSearchMode to 2? If so, can you please write out an MPS model file and post the file conte...

Thanks for reporting this issue. I'll open a support ticket on your behalf so we can investigate further.

The correct reaction mechanism is [1,0,0,1] and the correct rate constant is 0.3. Is the system were to predict this exact values the MSE and thus the objective should be very close to 0 (a few si...

The issue I am encountering is that even when I provide my system with the right reaction and rate constant as an initial guess, I get the same reaction (wrong) as when I don't. Gurobi searches f...

The condition I described in the post you referenced is a sufficient condition for a variable to appear in the objective function of an LP file with a \( 0 \) coefficient: Variables that are added...

If the MST start does not provide an incumbent solution are the values still used to start? No. However, if the MIP start does not produce an initial feasible solution, Gurobi might later try to ...

An HNT file is used to store variable hint values and variable hint priorities. Variable hints are different from solution vectors and MIP starts. The article What are the differences between MIP S...