Emu XL-7 & MP-7 User's Group

When I turn my Xl-7 on, I get this message- Error! Code 100. Save 
Failed. I'm using OS 1.31. The last time I used the unit and it 
booted up without this message, I set my tempo to ext to slave to my 
computer. Now, when I turn on and get this error, my tempo is still 
set to ext(this has not happened before). When I go to midi function 
to reset tempo, I get a message - Compact Data Now--press Enter. I 
hit midi button again and this goes away with a message that says, 
Compact Data Soon. Then the unit works fine. But this happens each 
time I turn on the unit. Anyone know what this means?