Gwyneth Butera
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Gurobi Staff
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Articles
Recent activity by Gwyneth Butera-
How do I resolve an UnsatisfiedLinkError in Java?
JNI applications require that you set the java.library.path when they run.JNI is the "Java Native Interface" -- the interface between managed Java code and the "native" operating system. It enable...
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How do I resolve an "ERROR 303" when running grbgetkey?
While setting up an academic license file via grbgetkey, you may receive the following error message:error : ERROR 303: Ip: <IP address> host "<hostname>" not recognized as belonging to an academic...
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How do I resolve the error "502 Bad Gateway" when using a WLS license?
While using a WLS license, you may receive an error similar to:Unrecognized response (status 502, POST https://token.gurobi.com/api/v1/tokens502 Bad GatewayThis error may occur if your computer hos...
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How do I resolve the error "LICENSES_ACADEMIC_EXISTS"?
While requesting a WLS Academic license via the User Portal, you may receive an error similar to:[LICENSES_ACADEMIC_EXISTS] Cannot create an academic WLS license since one already exists. Please ...
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Google Colab examples available
Gurobi Jupyter Notebook Modeling Examples are mathematical optimization models coded using the Gurobi Python API and implemented with Jupyter Notebooks.These Jupyter Notebook Modeling Examples: Tea...
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How do I resolve an "ERROR 405" when running grbgetkey?
If grbgetkey produces a message that looks like this:info : grbgetkey version 13.0.2, build v13.0.2rc1 info : Contacting Gurobi license server... error : ERROR 405: Cannot reinstall license 99999...
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Does the barrier algorithm return a basic solution for LPs?
With default parameters, the barrier algorithm will return a basic solution for linear programs. However, if you set the Crossover parameter to 0, then it will not.What is Crossover?Crossover is an...
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How do I request a license for an older version of Gurobi?
Gurobi licenses are backwards compatible, meaning you can use them to run versions of Gurobi older than the licensed version.Regardless of which Gurobi version is being used, Gurobi needs to know w...
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How do I resolve the error 'User account type is not academic'?
If you receive the error "[USER_NOT_ACADEMIC] User account type is not academic", you are currently registered as a Commercial User.To update your account, please update your account information in...
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How does log rotation work with Gurobi Compute Server?
Two grb_rs.cnf configuration properties control the rotation of log files: LOGFILE_MAX_SIZE is the maximum size in megabytes of the log file before it gets rotated. The default is 500 megabytes. ...