Trying to remapp some keys but when I go to settings --> Key Programmer, I get the attached message.
Are you running the most recent OS for your TC75x ? There have been some updates that fixed some issues with MX.
You can get the newest updates for the TC75x from TC75x Touch Computer Support & Downloads | Zebra under "Operating system".
Technical Architect, Kutir Mobility
Posted on behalf of Zebra Technologies