Go to . Select Online Activation/Deactivation .

The story of a "Mastercam 2021 license not found" error is usually one of missing drivers, disconnected hardware, or misconfigured network settings . The Missing "Purple Key"

A very specific error in Mastercam 2021 involves Windows User Access Control (UAC).

Mastercam uses nethasp.ini to know where to look for the network dongle. This file is often overwritten or missing.

If your software-based license has become "unlinked" or was never properly activated: YouTube·MLC CAD Systemshttps://www.youtube.com

If you are still stuck, use Mastercam's built-in diagnostic tools to find the specific point of failure: System Inspector Utility McamInspect.exe utility found on the Drivers and Utilities page . Click the button to check specifically for licensing problems. : If you need to contact Mastercam Support