The License Manager is older than the SolidWorks client.
Ensure ports and 25735 are open on the server firewall. The License Manager is older than the SolidWorks client
The SNL Manager must be the same version or newer than the CAD software. type regedit .
If you recently upgraded to 2020, an old registry key might be interfering. Press Win + R , type regedit . The License Manager is older than the SolidWorks client
