2100 Hot Hot! — Autodesk License Status

The error code belongs to Autodesk’s legacy network licensing system (FlexNet). The term "hot" is an internal status flag indicating that the license server believes a license is currently in use (checked out) , but the client machine is unable to communicate back to confirm or release that license properly.

Open the (formerly Desktop App) and check for updates under the My updates section. Installing the latest "Autodesk License Service" update often fixes checkout timeout errors. Reset the License Cache : autodesk license status 2100 hot

Do not just look for errors. Look for velocity . If your log shows hundreds of "DENIED" messages per second, your server is under-spec'd. The error code belongs to Autodesk’s legacy network