Describe to me the symptoms. I.E..what error messages are you seeing
when you run DSREPAIR, -672, -603, etc. Have you also checked external
references for bad obits. Ran DSBROWSE maybe to remove them..first
lock your DS then run it, that is. How bout running  the following;

SET DSTRACE=JANITOR

Janitor is a really good combination of switches. I can help, but I need
more info.