Casio PX410R - Manual (Page 78)

E-76
SMF Player Error Messages
The following explains what you should do when an error message appears in the SMF Player Mode.
Using the SMF Player
Use only Format 0 SMF data.
Use different data.
You are attempting to play SMF data that is
not Format 0.
There is a problem with the SMF data you are
trying to play or the data is corrupted.
Err Not SMF0
Err WrongDat
Error Message Cause Action