If the client cannot consistently reach the server, the license state may flicker.
Add lmgrd.exe and sw_d.exe as exceptions in your security software. 5. Verify the Serial Number in Registry If the client cannot consistently reach the server,
The SNL Manager must be the same version or newer than the CAD software. If the client cannot consistently reach the server,
If you recently upgraded to 2020, an old registry key might be interfering. Press Win + R , type regedit . If the client cannot consistently reach the server,
Corrupted temporary license files can trigger the 544 error code. Close SolidWorks. Go to C:\ProgramData\FLEXnet . Locate files starting with SW_D . the folder to FLEXnet_Old (don't delete it yet). Restart SolidWorks and try to activate again. 4. Check Firewall and Ports