Sonja Mars
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Gurobi Staff
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Articles
Recent activity by Sonja Mars-
Are there performance differences amongst the different Gurobi APIs?
The Gurobi APIs (Java, Python, C++, .NET, R, and MATLAB) are thin layers built on top of the C API. These APIs collect the data and pass it on to the core library, which is written in C. From a sol...
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New Documentation Site
We are happy to announce that our documentation has been moved to a new page. The page is located at docs.gurobi.com and includes our: Getting Started Pages Example Tour Reference Manual AMPL-Guro...
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Communication failed
While running grbgetkey to retrieve a license file, you might receive the error:Communication failed, check your network connection or set variable HTTPS_PROXY if you need a proxyIf your computer i...
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Gurobi release and support history
Gurobi versions are of the form X.Y.Z, where X is the major release, Y is the minor release, and Z is the technical release.Starting with major release 10, all Gurobi product releases are supported...
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ERROR 303: hostname not recognized as belonging to an academic domain
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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ERROR 405: Cannot reinstall license
If grbgetkey produces a message that looks like this:info : grbgetkey version 13.0.1, build v13.0.1rc0 info : Contacting Gurobi license server... error : ERROR 405: Cannot reinstall license 99999...
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How do I use GAMS with Gurobi?
If you have a standalone Gurobi license (free academic or commercial) and want to call Gurobi from inside GAMS, you need a Gurobi/GAMS link.You can add the paid Gurobi-Link license to your GAMS ins...
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What is the difference between user cuts and lazy constraints?
User cuts and lazy constraints are similar but have some important differences. User cuts help tighten the relaxation of a MIP by removing fractional solutions. They are not required for the model...
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How does IDLETIMEOUT work?
The idle timeout allows you to set a limit on how long a Compute Server or Cloud job can sit idle before the server kills the job.BackgroundBoth Gurobi Compute Server and the Instant Cloud are base...
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Gurobi 12.0 released
As of November 2024, Gurobi version 12.0.0 is officially released! Please download this newest major release from the Download Center on our website. Further information Download the latest version...