Mastercam 2021 License Not Found Site

Sometimes the dongle is recognized but not active.

Microsoft Windows Updates are notorious for breaking Mastercam licensing. A Windows 10 or 11 security patch often revokes unsigned drivers or resets USB power management.

The standard uninstaller leaves behind registry entries. You need the official Sentinel System Driver Removal Tool.

Warning: This will affect licenses for any software using Sentinel HASP (e.g., Solidworks, Catia, some accounting software). mastercam 2021 license not found

Mastercam 2021 uses a hybrid system. It relies on CodeMeter (by Wibu-Systems) to manage the licensing, but it also requires legacy Sentinel drivers. If either is corrupted, you get the error.

Published: October 2023 Difficulty: Intermediate

Nothing halts a manufacturing workflow faster than launching Mastercam 2021 only to be greeted by the dreaded red banner: "License Not Found" or "No License Found." Sometimes the dongle is recognized but not active

For CNC programmers and machinists, time is money. This error can stem from something as simple as a disconnected USB dongle to complex Windows driver corruption. Below is a systematic guide to getting your Mastercam 2021 back online.

| Error Message | Most Likely Fix | |---------------|----------------| | "No SIM found" | USB key not detected → check USB port/drivers | | "NetHASP not found" | Network issue → restart License Manager / check firewall | | "License file corrupted" | Delete license cache → restart Mastercam | | "Feature not available" | License type mismatch → re-select license via settings |

Windows saves power by turning off USB ports when they are not "active." Mastercam checks the dongle infrequently, so Windows thinks the port is idle and kills the connection. Additional Step for Laptops: Go to Device Manager

This is a massive cause of "License Not Found" appearing 10 minutes into using Mastercam, not at startup.

To disable USB Selective Suspend:

Additional Step for Laptops: Go to Device Manager > Universal Serial Bus controllers. Right-click each USB Root Hub > Properties > Power Management > Uncheck "Allow the computer to turn off this device."

Mastercam uses a file called nethasp.ini to find the license server. If this file is missing information or corrupted, the license will not be found.

Steps: