This return code can be received when the server discovers
a problem during a backup.
  We have seen this occur with both DB2/6000 and DataTools
SQL-BackTrack. Ususally it seems to be caused because the
original size estimate given by the application is much
smaller than the actual size of the object backed up.
This happens because it is very difficult to know
how many bytes will actually be backed up.
  The ADSM server gets this small size estimate and does
the initial allocation without any problem. However, when the
object needs more room, the server can run out of
space while doing 'emergency extends'. The condition can be
because there is physically no more space, or because cached
files are using the space.

  So, one way to help is turning caching off.
A better way is to backup directly to tape by setting up a
management class for databases.

  The application developers are trying to find better ways
to calculate size estimates in the mean time.

  Betsy Colby