Applies to: ZWCAD 2017; ZWCAD Classic
If you encounter the issue that can not start up the service even though try to turn it on in service.msc, and the error message is -97, 121, please try the following way to fix this problem.
1. Clean up all the lmgrd process in the task manager->processing
2. Delete the key HKEY_CURRENT_USER\SOFTWARE\FLEXlm License Manager in registry
3. Delete the original service and re-configure it again.