Marika Karbstein
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Latest activity by Marika Karbstein-
Marika Karbstein commented,
Hi Yin Can, Thanks, I could access the files. (The lp file would have been sufficient.)Your problem can be solved within 1 second without any issues with the default parameter setting. You have set...
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Marika Karbstein commented,
Hi Yin Can, The statistics look ok, but the model seems to be numerical challenging. Could you share your model file? You cannot attach a file to a community post. But can you use some share servic...
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Marika Karbstein commented,
In the first line of the B&B log you see a "postponed" for the objective. This means numerical troubles were encountered during the solution of the relaxation, see also the post What are postponed ...
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Marika Karbstein commented,
There are several issues in your formulation The expressions in the indicator constraints (see Model.addGenConstrIndicator() ) need brackets, e.g., model.addConstr((x7 == 1) >> (x1 + 2*x2 + x4 ==...
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Marika Karbstein commented,
Could you try setting the system environment variable GRB_LICENSE_FILE to point to the gurobi license file? Please check also the article How do I resolve an "Error 10009: Unable to open Gurobi lic...
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Marika Karbstein commented,
In your example, some of the continuous variables are identified to be implied integers. So, there is an optimal solution where these variables take integer values. Also, how can I make the contin...
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Marika Karbstein commented,
I assume there is only one part for which AQ-Q <= TH < AQ holds. You need to have B1=1 if AQ-Q <= TH and B2=1 if TH < AQ. Then with Model.addGenConstrAnd() you can get B4=1 if both B1 and B2 are on...
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Marika Karbstein commented,
I am not sure if I understand your setting. But isn't it enough to change the sign of eps, i.e., m.addConstr((AQ[i]-Q[i])>=(TH-eps-(1-Binary1[i])*M)) m.addConstr((AQ[i]-Q[i])<=(TH-eps+(Binary1[i]...
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Marika Karbstein commented,
Our Tutorial: Preparing a Minimal Reproducible Example – Gurobi Help Center discusses how to identify the cause of a Key error. If this does not help, please make your example reproducible.
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Marika Karbstein commented,
Please have a look at this post, it covers the same warning you see.