Simon Bowly
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Recent activity by Simon Bowly
Hi Victor, Could you please post a minimal, reproducible example? This must include how all variables and data in your code are created so that we can reproduce the error and point to the issue. An...

Hi Mohamad, Since the Gurobi logging output has started, your formulation code is complete and the model is being solved (i.e. the model.optimize() statement has been reached). So I don't think you...

Hi Mohamad, I ran your code, but found that the model is formulated and solved in a fraction of a second. So it is hard to say where the bottleneck is. I assume you are running this with a much lar...

Hi Ryusei, When you write an ILP file, Gurobi writes the computed Irreducible Inconsistent Subsystem (IIS) of your infeasibly model to the named file. This is not the full model, but is instead a s...

Hi Grace, You cannot automate the machine licensing process, but an alternative is to use a WLS license. This license is not bound to a specific machine, but it requires that the cluster machines c...

Hi Grace, We offer free site licenses to academic institutions which are best suited for use on cluster machines. Ask your network administrator at the university to submit a request at support.gur...

It's not possible to do this via numpy's type casting functions; you need to construct constraints to specify the relationship between v and k. I'm assuming here that k_i are binary variables in th...

In your code, I think there may exist such a condition that: A has 5 rows, in this loop, if A[1,:]@X, A[2,:]@X, A[3,:]@X is smaller than b1[1], b1[2], b1[3] respectively, then z[1]==1 until now. ...

Hi Elena, It looks like you have a pandas Series somewhere in your algebraic expression. Are arrival_rate or service_time pandas data structures? If you are building Gurobi models using data stored...

Hi Jiang, I believe you need the following code to model the feasible set as the union of nonoverlapping polytopes: import gurobipy as gpfrom gurobipy import GRBimport numpy as np# Some random dat...