Alison Cozad

Are you looking to improve your model-building time or solver runtime?

Hi Carl, Do you already have an academic license? If so, then Gurobi is not finding your license file (gurobi.lic) for your full license. Instead, it is finding the size-limited license.  To resol...

The article Riley noted is a great place to determine why your model is infeasible.  I just wanted to add an example to build on what you will learn in that article: workforce1.py. If you want to t...

Hi Millend, Based on your error, I suspect you are using an LP file for your model.  For LP files, equality constraints are defined using \(\texttt{=}\) rather than \(\texttt{==}\) . For example, t...

You can retrieve variable values after optimizing with the X variable attribute.  For example, Simon used this attribute check with the variable value \(\texttt{v.X}\) is greater than 0.9 in the co...

I am glad you were able to find our Guidelines for Numerical Issues.  This was put together because the most effective way to improve model numerics is through upfront reformulation.  Because of th...

To help expand on these two feasibility tolerances: FeasibilityTol (Primal feasibility tolerance) Default value: 1.00E-06 Description: All constraints must be satisfied to a tolerance of Feasibili...

Hi Manuel, I have created a help request from this.  We can discuss licensing options for you in that request.

There are a few ways you can do this.  Here is one way to accomplish the nested summations using quicksum(): import gurobipy as gpfrom gurobipy import GRBimport numpy as np# Create a new modelmodel...

Hi Jingyuan,There are three academic cloud options.  You can read about them in What are the options for using an academic license on the cloud?