I try to create an NCP share over my existing ReiserFS on my OES 2 but I only get this error:

artemis:~ # ncpcon create volume VOL1 /media/ncpshares/VOL1/
... Executing " create volume VOL1 /media/ncpshares/VOL1/"
Volume VOL1 could not be created, error 22.

Where do I find a list of the numerical error codes with helpful descriptions? The logical place imho would be in the NCP Server documentation for OES 2,
but there is nothing. At least nothing obvious.