It could be the SD card telling you it's full. I have six SD cards five of which will not accept any more data for storage. I got an 'error' message as each one reached its capacity although the card itself showed several unused folders. I understand the amount of data a card can store is firstly, of course, based on the size of card being used and secondly, how much data you actually choose to save. Most professionals save very little mostly because they choose not to via the composer/sequencer etc., but I am very much an amateur so I choose to save everything in the 'EXPAND' mode and mostly 'ALL' Panel Memories which of course quickly uses up the storage space.

Maybe it's is something of this sort that is causing you to get this 'error' message.

I cannot for the life of me think why our keyboards do not just show "SD Card FULL" instead of showing an 'error' message but I guess we'll never know now will we?

Hope this helps!

Aud