How do I resolve the error "Problem generating unique host ID for this machine"?

You may encounter the following error when using grbgetkey to set up a license file on your machine:

error : Problem generating unique host ID for this machine.

For many license types (like academic named-user licenses), Gurobi uses information from the machine's primary network adapter to generate a host ID. This error indicates there was a problem generating a static host ID from the machine's primary network adapter. It is common to see this error when using grbgetkey in containerized and/or virtualized environments like Docker, QEMU, and OpenVZ.

To resolve the error:

• If you are using virtualization software that allows it, try assigning a unique, static MAC address to the virtual machine/server. This is typically not an option in containerized environments like Docker.
• Consider using a Web License Service (WLS) license instead. WLS licenses can be run in virtually any environment and do not rely on the machine having a static host ID.
  • Commercial users can contact their account manager for more information or request a trial license on the Gurobi website.
  • Academic users can request a free academic WLS license in the Gurobi User Portal. Academic WLS licenses can be renewed in the Gurobi User Portal once they expire.

Further information

• Download Gurobi Optimizer
• How do I retrieve and set up a Gurobi license?
• How do I set up a Web License Service (WLS) client license?
• What is an Academic WLS license?
• How do I obtain a free academic license?