Michael Mell
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Activity overview
Latest activity by Michael Mell-
Michael Mell commented,
Thank you for the quick reply. Could you provide me with a code-snippet of what the XML-fragment would look like for this transformer? I am not very familiar with this... Thanks. --- UPDATE: Is thi...
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Michael Mell created a post,
My software build is _broken_ after upgrading to Gurobi 10.0.3 Maven package
OngoingDear all, I am using the Gurobi optimizer as part of a Java application that I am developing. I am currently trying to move to the official Gurobi Maven 10.0.3 package. For this I have added the fo...
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Michael Mell created a post,
What are possible reasons that can cause Gurobi to crash in a Java application with a core-dump?
OngoingI have written an application that uses Gurobi at its core. As part of it functionality, it stores/reloads Gurobi models to/from MPS files. This has been working well so far. However, I am now faci...
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Michael Mell created a post,
How to query GRBModel for pending operations
Awaiting user inputGRBModel in the Java API has the update method: GRBModel.update() which according to the documentation is used to (https://www.gurobi.com/documentation/8.1/refman/java_grbmodel_update.html): Proce...
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Michael Mell created a post,
How to add a binary variable without objective value using the Java API
AnsweredDear all, my question is how to create binary variable in Gurobi without assigning a cost/objective value to it. I use the Java API method `GRBModel.addVar(...)` to add variables to my model; this ...
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Michael Mell commented,
Dear Jaromil, to follow up on this issue: I was able to solve it. Indeed, the reason was the duplication of variable names. There was a bug in the code that caused this. Best regards and thank you,...
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Michael Mell created a post,
Gurobi stops storing variable names to the MPS file for large models, which breaks my use case - uses place holder names instead
AnsweredDear all, In my application I use the names of the Gurobi variables and constraints to match them to objects in my program code, which I then use to display them to the user for interaction in a GU...
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Michael Mell commented,
Hi Matthias, that clears my last doubts then. Thank you! It is too bad (and a bit surprising) that you cannot store the full optimizer state (as a type of snapshot of system memory) and load it fro...
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Michael Mell commented,
Dear Matthias, dear Runqiu, thank you for your replies. They have helped clarify things for me. @Matthias Miltenberger: I have two more questions and then hopefully I should be happy :) ... First l...
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Michael Mell commented,
Hi Matthias, thank you for the quick reply. So I understand correctly, that the call to model.optimize() is unavoidable even when loading the solution from disk? But then how can I make sure that t...