Ooh, ooh, a thought occurs to me.

Can you get the results of:

ls -ld /empeg/fids0
ls -ld /empeg/fids1
ls -l /empeg/fids0
ls -l /empeg/fids1

For that is actually how the empeg gets to the tunes. If the symlinks are missing, it'll not find anything.

Alternatively, reapplying a developer upgrade file will fix the symlinks anyway.
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-- roger