Matthias Miltenberger
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Gurobi Staff
Gurobi Optimization Support Manager - Berlin, Germany
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Articles
Recent activity by Matthias Miltenberger-
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 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 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 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 ...
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How do I resolve the error "TypeError due to missing GUROBI_HOME"?
Note: This only affects Gurobi 9.1.0 and earlier running on the Windows platform with Python versions 3.8 and later.When installing Gurobi via conda, i.e., conda install -c gurobi gurobiyou may rec...