The "No SIM Found" error in Mastercam X5 is a common licensing issue, usually referring to a missing or unrecognized HASP (Hardware Against Software Piracy)

: Disconnect the SIM from its current slot and plug it into a different USB port. Avoid using external USB hubs or front-panel ports on desktop computers. Plug the SIM directly into the motherboard ports on the back of the computer.

If the dongle is plugged in but the software doesn't see it, the driver is likely missing or corrupted.

Press 7 or F7 to choose . 5. Using the Mastercam System Inspector

Press Win + R , type services.msc , and press Enter. Locate Sentinel Local License Manager . Right-click it, select Properties , set the Startup type to Automatic , and click Start .