Hi Dave,
Seems like you own a s970. You need to do 2 steps when you make changes on RGT. If you miss the second, that message will display when you move to the next, even if you turn off the KB.
Step 1: Hit the memory button (next to freeze button), to save changes in each button.
Step 2: Go to Registration, menu 2, and save the RGT name.
Thanks - Ted