Mastercam 2021 License Not Found [work] -

Troubleshooting Guide: Fixing the "Mastercam 2021 License Not Found" Error

Published: October 2023 Difficulty: Intermediate

echo Restarting services... net start CodeMeter.exe net start Sentinel64 mastercam 2021 license not found

  1. Go to Control Panel → Windows Defender Firewall → Advanced settings.
  2. Inbound Rules → New Rule → Port → UDP → Specific local ports: 475 → Allow the connection.
  3. Repeat for port 1947 if needed.
  4. Name the rule "Mastercam NetHASP" and enable it.
  1. Uninstall Mastercam 2021 via Control Panel.
  2. Use the Sentinel HASP LDK Removal Tool (available from Thales) to purge all drivers.
  3. Manually delete these folders (if they remain):

    Conclusion: Back to Machining

    The "Mastercam 2021 license not found" error is almost always resolvable without calling your reseller. By systematically working from physical checks (USB dongle, LED lights) through driver management (Sentinel LDK) and network configuration (nhasp9.exe), you can reclaim your license in under 30 minutes. Go to Control Panel → Windows Defender Firewall

    The "Mastercam license not found" error typically occurs when the software cannot communicate with its security key (HASP), the network server, or its software-based license Uninstall Mastercam 2021 via Control Panel

    1) Confirm license type & files

    • License type: Identify if you use a USB dongle (hardware), network/server license, or standalone (file-based) license.
    • Required files: For standalone, ensure the license file (.lic or .dat) is present in Mastercam's license folder (typically C:\Users\Public\Documents\Shared Files\Mastercam\Licenses or C:\ProgramData\CNC Software\Mastercam\Licenses).