Simon Bowly

Hi Keyur, In the first case (minrelax=False), Gurobi modifies the model so that it aims to minimize violations of the constraints while entirely ignoring your original objective. So, if you do the ...

Hi Daniele, We currently have a few issues with interactions between Var/LinExpr and MVar/MLinExpr. There were some fixes added to the most recent release (version 9.5.1) which should address your ...

Hi Edmond, It looks like you are using the older JuMP API (which uses with_optimizer).  You'll need to update your code to use the following method to build a model: using JuMPusing Gurobimodel = M...

Hi Edmond, Can you first make sure you have the latest version of Gurobi.jl installed, and then rebuild the package? The latest Gurobi.jl version right now is 0.11.0, so the sequence of commands in...

Hi Hongyu, There doesn't seem to be a method in JuMP to directly access the constraint matrix anymore, due to the different types of constraints it can handle. There is some discussion about this i...

Hi Hongyu, When you say print the matrix, do you mean you want to extract all coefficients of all constraints into a dense or sparse array? Or are you just aiming to traverse all constraints and va...

Hi Zahra, You can store solution values and/or variables in a Python dictionary in order to access them in later iterations. It may help to familiarise yourself with the following article covering ...

Hi Zahra, Could you elaborate on what you are trying to achieve here? Are you trying to solve separate models in each iteration of the loop and extract the solution values to use in a separate mode...

Hi Jacob, I assume you are using JuMP and are looking for a way to track some information across callbacks as we do in some of the Python example codes? Julia does not support dynamic attribute ass...

Hi Yasaman, In the interactive shell a different import command is run so that Gurobi's "read" command can be called directly. For normal python code, you'll need to give the "gp" package name for ...