To resolve error: -21 and error: -25: Your license is not compatible with the current version of the software. This typically means you have a paid-up license without an active TECS. The problem can be resolved by renewing your TECS.
This section goes over how to check to ensure the Flexnet Server service is set up correctly to be able to run while the FLEXNet Licensing Utilities is not currently open.
You want information about common FlexNet® error codes and their meaning. The following articles address the most common FlexNet error conditions: "Network License Not Available. Error [-5.412.0]" when launching Autodesk software.
Are you getting the *"FlexNet License Finder"* popup in *AutoCAD 2025* or other Autodesk software? Don’t worry — this video shows you the easiest and most effective way to fix the license ...
The license server manager (lmgrd) has not been started yet, the wrong port@host or license file is being used, or the port or hostname in the license file has been changed.