
Marika Karbstein
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Latest activity by Marika Karbstein-
Marika Karbstein commented,
Hi Caroline, We have a KB article about How do I determine why my model is infeasible?Do you have any troubles with the proposed approaches? Best regards,Marika
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Marika Karbstein commented,
Thanks for the additional information.Please note that the Matrix Python API is especially for models already given in matrix notation. It is not efficient to use mVars mixed with term-based notati...
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Marika Karbstein commented,
Do you talk about model building time?Can you share more details, i.e., can you provide a small example where addMVar() takes longer than addVars()? Did you check that both of your versions result ...
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Marika Karbstein commented,
The documentation of GRBcbcut provides a small example. The usage is similar to adding lazy constraints. So, for the general guidelines, you can use the tsp example. It is not possible to add only ...
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Marika Karbstein commented,
It is right, you need only one callback function. The "where" argument in the callback function indicates at which step of the algorithm the code is called, see Callback Codes.The relevant function...
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Marika Karbstein commented,
Can you share the Gurobi log file of the whole run?Are you only changing the Obj attribute of some variables? Or do you use some other calls?
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Marika Karbstein commented,
Hi Marloes, I am not so familiar with Julia. Could you make sure that the parameter PoolSearchMode is active in your run?I tested some Julia code I found here: using JuMP, Gurobim = Model(optimizer...
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Marika Karbstein commented,
Do I understand correctly that the difference is only in the objective function, but you get a different number of solutions? Did you also set the parameter PoolGap or PoolGapAbs? Can you share the...
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Marika Karbstein commented,
Please have a look at the detailed release notes for Gurobi version 12.0.
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Marika Karbstein commented,
You can use a gurobi.env file to set OutputFlag or LogToConsole to 0 as described as the second option in How do I suppress all console output from Gurobi? Managing the Gurobi environment and setti...