Lennart Lahrs

For the public record, Gurobi version 12.0.1 solved the issue Leonard faced with this model and relates to "Fixed bug in implicitly handling lower bounds in cone constraints that can lead to sub-op...

Thanks, Leonard, for posting your observations here! I created a support ticket so we can investigate the model files.

Our recent release Gurobi Optimizer 12.0 has some improvements in this area which may help here. Specifically, status, best objective value, best bound, mip gap, simplex iteration count, explored a...

Both ObjNRelTol and ObjNAbsTol are considered by MIPs, while for pure LPs only ObjNAbsTol is considered and handled differently. The page Working With Multiple Objectives is another good reference ...

Correct, this method is referred to as epsilon constraint method.

Hi Arun,When using hierarchical multi-objective with two objectives, by default you will receive only a single solution which is optimal with respect to the highest priority objective and also opti...

Hi Margi, The Gurobi log outputs the number of continuous, integer, and binary variables.Note that any binary variable is also considered an integer variable. E.g.: Optimize a model with 0 rows, 3 ...

I suggest, yes. You could also try more aggressive Cuts settings, which might help to come to a conclusion more quickly.

Hi Andrew, I recommend you experiment with MIPFocus, Heuristics, and NoRelHeurTime. With MIPFocus and Heuristics, you can direct Gurobi to prioritize finding feasible solutions. Although your model...

Hi Koustav, Unfortunately, I was not able to reproduce the error. Can you please share which gurobipy and Python version you are using? Did you already add any other code to the code snippet above?...