Riley Clement

Hi Zemin,I would start here: Products of Variables in Mixed Integer Programming (Gurobi YouTube)- Riley

Hi Daisy,The issue is coming from the very small objective coefficients:Coefficient statistics: Matrix range [5e-01, 2e+03] Objective range [2e-05, 1e-02] Bounds range [1e+00, 9e+02] R...

Thanks Daisy, I'll take a look and see if I can replicate the issue.- Riley

Hi,This looks sort of correct to me.You are creating TempConstr objects and then adding them to some constraint_scheduling object.  Generally you would add use addConstr( ) to add these TempConstr ...

Note that if your subproblem is in dual form, and unbounded you will need the UnbdRay attribute. 

Hi Bryan,Yes Gurobi should detect the structure.  You can test this by setting Disconnected=0 to disable detection and observing any difference in performance.- Riley

Hi Ozge,It's good to hear it worked, the preprocessed model can certainly give you inspiration for investigating things you may do yourself (and setting Aggregate=0 and DualReductions=0 may help). ...

Hi Ozge,Is there a recommended way to avoid checking every node, or to check only every X nodes, for performanceThere's a couple of ways this could be achieved, for example, say you wanted to check...

Hi Bobak,Could the extreme gap really be due solely to the non‑determinism from multithreading/default ConcurrentMIP, even with a very large TimeLimit?Even with no-multithreading and deterministic ...

Hi Salvador,I find this behaviour a bit weirdIt is weird, but maybe less weird in context of the warningsWarning: max constraint violation (6.8001e-01) exceeds tolerance Warning: max general constr...