Interesting note....
When I went to delete the offending song, Empeg reported deleting a different song, and then promptly failed the sync process.
I went back in and deleted the cross reference song and all is well.
guess they got corrupt aginst the files table or Database??
The Error was:
The synchronisation process failed during stage 10:
Operation not permitted error 0xffffffff

12Gb MKII 080000516 Blue