My guess is that it is failing at the same point (bit file object) daily.
By any chance, did you have an ADSM server abort or Unix level system crash
while your incremental backup or archive processing was running recently?
You probably want to contact ADSM support about this one.  There are some
SHOW commands that you can do to identify the node/file in question.  There
is also a way to delete a problem object (although it run for a long time).
I would not attempt to use these without involving at least ADSM level 2.