Matthias Miltenberger
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Gurobi Staff
Gurobi Optimization Support Manager - Berlin, Germany
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Articles
Recent activity by Matthias Miltenberger-
Can I access the MIP cuts generated by Gurobi?
No, it is not possible to access these cutting planes. The cuts are generated in terms of the presolved model. Since Gurobi does not expose the presolved model, you also won't be able to retrieve t...
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How do I update my Gurobi installation to a newer version?
When upgrading to a new major version, e.g. 12.x to 13.x, there may be backward-incompatible changes. All additions, changes, and removals are outlined in our Release Notes.Updating a full Gurobi i...
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How do I resolve an "ERROR 10009: Token validation error"?
The error ERROR 10009: Token validation errorindicates that your WLS token has expired and a new one could not be acquired. The is most likely reason for this is due to too frequent token requests....
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How do I start Compute Server as a service (grb_rs)?
Compute Server (grb_rs) can be started either as a process:> grb_rsor as a service:> grb_rs install > grb_rs startWhile these options are similar, there are some important differences to consider.L...
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How do I check for a valid license file?
To check whether a valid license file is available, rungurobi_clfrom the command line. This command will return an error if the license file is not set up correctly. Please see How do I test my Gur...
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How do I set environment variables for Python/Jupyter?
You can specify the location of a Gurobi license file by setting the environment variable GRB_LICENSE_FILE. In some environments like interactive Jupyter sessions running in VSCode, it may be diffi...
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How do I stop a running Compute Server?
The error messageerror : Error creating storage service, was grb_rs already started? : Error opening data store: Opening DB failedindicates that there is a Compute Server (grb_rs) with the sa...
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How do I use priorities in Compute Server groups?
Optimization jobs can be sent to a Compute Server using different priorities to control the queueing process. If the Compute Server cluster is organized into multiple groups, each group can be assi...
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Why does Gurobi perform differently on different machines?
Solving the same model on different machines can result in different solution paths.This effect is a well-known phenomenon called "Performance Variability". Hardware plays an important role as the...
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How do I efficiently add constraints using std::vector in C++?
When building constraints in C++ using the following data structures:std::vector<double> a; std::vector<GRBVar> x;The most efficient method is to use addTerms() to construct a linear expression in ...