Eli Towle

Hi Margaret, By default, the messages Greg mentioned would appear in the logfile and output produced by Gurobi when you solve a model. E.g.: Gurobi 9.0.2 (mac64, gurobi_cl) logging started Fri Jun ...

Hi Hooman, Can you please post a small, self-contained code example that reproduces the problem? It's not clear exactly how you define everything. Also, Gurobi does not support raising variables to...

Hi Xin, I would try computing an IIS to determine which constraints are contributing to the infeasibility. This should help you identify if there is a problem with the constraints, or even the data...

Hi Margaret, I'll open a ticket for you in our online support portal to investigate this. Thanks, Eli

Hi Ilona, Gurobi doesn't directly support terms like \( e^x \). That said, you could try building a piecewise-linear approximation of the nonlinear constraints on the \( y^i \) variables. Gurobi ev...

Hi Christina, Gurobi 9.0.2 only supports R 3.6. I'll open a ticket for you in our online support portal to discuss this further. Best, Eli

Hi Silvia, There unfortunately isn't a way to add user cuts through the Gurobi MATLAB interface. You would have to import the data into another API that supports user cuts (e.g., Model.cbCut() in P...

Hi Sami, Can you post a minimal working example of the code that reproduces this behavior? Also, which version of Gurobi are you using? Thanks, Eli

Hi Kati, Gurobi 9.0.0 was the first version to support writing .attr and .json files. Could you upgrade to the latest version of Gurobi (9.0.2) and try again? Thanks, Eli

Hi, You shouldn't cast the \( \texttt{GRBVar} \) object to an \( \texttt{int} \), since you want to build your objective expression using the variable objects that you've added to the model. But I ...