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 proxy
If your computer is connected to the internet but requires a proxy, you can specify a username and password in the environment variables HTTPS_PROXY and HTTP_PROXY by setting them to http://username:password@proxy-server:port.
Commercial license users
If your computer isn't connected to the Internet or if your network security system does not allow the command below to function, we also offer a manual license key process. See How do I generate a license file for a computer without internet access? for more information.
Individual Named-User Academic license users
Please check the following conditions for the computer where you want to install the free academic license:
- The computer can communicate with the Gurobi User Portal.
- The computer is not using a proxy server.
- The grbgetkey program is not blocked by a personal firewall or an internet security program.