Eli Towle

Hi Antonio, Do you see this same behavior with the latest version of Gurobi (9.0.2)? Thanks, Eli

Hi Sab, The additional variables don't limit the candidate locations. Because your objective is \( 0 \), Gurobi just looks for a feasible solution. There is no incentive in the objective function t...

Hi Yaojian, I see, the "harvest time" index of the inventory tracks when the product was harvested. It makes sense to track this in order to determine when the product expires (shelf life is up). A...

Hi Yaojian, The constraints are still not written correctly: \( h \) and \( t \) are not defined in the forall statement, so we can't include \( h \) and \( t \) here. Is there a textbook or paper ...

Hi Monir, The Runtime is the time used by Gurobi to solve the problem. It does not include model-building time (adding the variables, constraints, etc.). Where exactly do you start and end your man...

Hi Margaret, If you want to use different cloud pools within a single Python script, you can set the \( \texttt{GRB_LICENSE_FILE} \) environment variable inside of the script, immediately before so...

Hi Fabien, The MIPSOL callback should be called whenever an integer-feasible solution is found. Is the MIPSOL callback not called at all, or is the problem that your lazy constraint isn't added or ...

Hi Bruno, Maybe this is the problem: the \( \texttt{for t in T} \) should be inside of the \( \texttt{quicksum()} \) function when you define \( \texttt{LHS} \). I.e.: LHS = {(i,k): (quicksum(f.sum...

Hi Bruno, What exactly is the error you are getting? You might need to add parentheses around the indices in the \( \texttt{LHS} \) construction where you check if \( (i,j) \in A \) and \( (\ell, i...

Hi Margaret, I'm not sure that there is a way to do this programmatically with Pyomo (short of modifying the Pyomo source), since Pyomo doesn't appear to give you access to the Gurobi environment. ...