If you use a physical USB HASP, unplug it and plug it into a different USB port to force the system to re-recognise the device.
Before diving into complex troubleshooting, try these immediate steps: mastercam 2021 license not found
You can check if a license is active on your machine without opening the main software: If you use a physical USB HASP, unplug
If you are on a network license and Mastercam cannot find the server: mastercam 2021 license not found
Open the Mastercam Launcher (found in the Mastercam dropdowns in the Start menu) and ensure the "License Type" is correctly set to either Software or Hardware (HASP/NetHASP) depending on your license.
For stable connections, ensure the license server has a static IP address rather than a dynamic one. 3. Re-activating Software Licenses