Sonja Mars
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Gurobi Staff
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Articles
Recent activity by Sonja Mars-
How do I obtain a free academic license?
If you are a faculty member, student, or staff of a recognized degree-granting academic institution, you can obtain a free academic license from our website. These licenses may only be used for res...
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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...