This is not an unusual message, and some of the tech folks belive it's because the keyboard is doing other things at the time the registration edit is being called up. You may want to back up all your data and do a system restoration, which solves a lot of these types of problems.
Good Luck,
Gary
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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)