Simon Bowly
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Recent activity by Simon Bowly-
How do I manage Gurobi environments in gurobipy?
Constructing and solving any Gurobi model requires creating a Gurobi environment. While in other APIs Gurobi environments must be explicitly created and destroyed, gurobipy includes the default env...
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Memory leak in gurobipy with Python 3.12
Affected versions: v11.0.0, v11.0.1, v11.0.2, v11.0.3To be resolved in version: Gurobi v12.0.0 In certain circumstances a memory leak can occur when using gurobipy 11.0.x and Python 3.12. The issue...
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What should I do upon "RuntimeWarning: Chained matrix multiplications of MVars..."
This warning indicates that matrix-friendly API modeling code may be slower than necessary due to the order in which arithmetic operations are carried out. The resulting model is still correct, but...
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Resolved in gurobipy v11.0.3: Compatibility issues with numpy 2.0
Affected versions: v10.0.x, v11.0.0, v11.0.1, v11.0.2Resolved in version: Gurobi v11.0.3 The matrix-friendly API in gurobipy is not yet compatible with numpy version 2.0. If you have installed guro...
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How do I resolve an "ERROR 201" when running grbgetkey?
When installing a license using grbgetkey, you may receive the following error message: info : grbgetkey version 11.0.3, build v11.0.3rc0info : Contacting Gurobi license server...error : ERROR 201:...
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How do I check the version of my Gurobi installation?
The current release of Gurobi is version 11.0.2. If you see v11.0.2rc0 in the logging output below, you are using the up-to-date version. Using gurobi_cl If the full Gurobi package or conda packa...
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Google Colab: Installation and Licensing
Google Colab (https://research.google.com/colaboratory/) provides an easy way to use Gurobi with Python + Jupyter notebooks, with no local software installation required. The Gurobi solver can be u...
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Resolved in Gurobi v10.0.3: Compatibility issues with numpy 1.25 and scipy 1.11
Affected versions: v9.0.x, v9.1.x, v9.5.0, v9.5.1, v9.5.2, v10.0.0, v1 0.0.1 , v10.0.2Resolved in version: Gurobi v10.0.3 Issue with sparse array incompatibility with the matrix-friendly API for sc...
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Gurobi OptiMods error: "Given data exceeds Gurobi trial license limits"
When using the Gurobi OptiMods package, you may encounter the following error when attempting to run a Mod: Restricted license - for non-production use only - expires 2024-10-28...ValueError: Given...