Matthias Miltenberger
Gurobi Optimization Support Engineer - Berlin, Germany
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Activity overview
Latest activity by Matthias Miltenberger-
Matthias Miltenberger commented,
The same question has also been posted on StackOverflow: How can I get values of variables awaiting model update in Gurobi python - Stack Overflow
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Matthias Miltenberger commented,
Hi Luca, The Gurobi package is not available on Anaconda for all Python versions: Files :: Anaconda.org Specifically, Gurobi for Python 3.9 is not available. You can either use a different Python v...
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Matthias Miltenberger commented,
Hi Kechen, To copy a model in C++, you have to use the GRBModel constructor and pass the existing model as a parameter. This is explained here: GRBModel(). I hope that helps! Cheers,Matthias
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Matthias Miltenberger commented,
Hi Jose, Well, you might want to specify a binary variable for each segment/interval and then set up the corresponding indicator constraints to enforce your variables to be within these intervals. ...
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Matthias Miltenberger commented,
Hi Tessa, Typically, only the random seed is different for the single runs. In most cases, this already provides enough variability compared to the non-concurrent optimization. You can also set cus...
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Matthias Miltenberger commented,
Hi Runqiu, You can store the data structure containing the variables as a new member of the model object: def model_create_and_solve(): m = gp.Model() # add vars... x = m.addVars(station_s...
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Matthias Miltenberger commented,
Hi Jose, It seems you are trying to use the value of a variable directly in the formulation. You cannot have an if-condition as if b1 == 0: for a binary variable b1. You need to use indicator cons...
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Matthias Miltenberger commented,
Hi Ankit, I recommend testing your code on a small toy problem so you can inspect and analyze every single step. One thing I noticed is that you are using a pretty old Gurobi version. You should de...
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Matthias Miltenberger commented,
Hi Konstantinos Konstantinidis, I just replicated the same procedure using Julia 1.6.5 and it still works just the same - no issues on my machine. Maybe you can try re-installing Julia? I don't kno...
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Matthias Miltenberger commented,
Hi Konstantinos, Your issue appears to be the same as that one on the GitHub of Gurobi.jl:Gurobi 9.5.0 -- Unable to locate Gurobi installation. Running some common diagnostics · Issue #440 · jump-d...