Viscount RD-70 Quick Reference Manual page 37

Disk protected
Cause of error:
You have tried to write or delete data on a protected disk
Remedy:
Close the tab in the top right hand corner of the disk
No Play song
Cause of error:
The song selected cannot be played by the RD-70.
Remedy:
The identification parameters of the song that you have selected are incorrect or
have not been updated.
Take the software or instrument used to create the song and transfer the data
onto the RD-70 by MIDI .
Format error
Cause of error:
An error has been detected during the disk formatting procedure.
Remedy:
If the error appears as soon as the disk is inserted, check that it is not protected
against overwriting (tab in top right hand corner of floppy disk should be closed)
If the error appears while the tracks are being recorded, it means that the disk
that you are using is severely demaged and must be changed.
Disk full
Cause of error:
The disk that you are using does not have enough space to store any more
data.
Remedy:
Insert a new formatted disk or delete files that are no longer needed.
Go back to the beginning of the operation underway when the error appeared