Some time ago I reported seeing internal server errors occasionally
when a particular client system ran backups. Several respondants
recommended upgrading to a newer client level. We recently did so,
but we are still seeing the internal server errors. A typical set
of messages is as follows:

21:03:31 ANR9999D BFCREATE(1799): Unexpected session descriptor 10a26a80
         for open aggregate, received descriptor 10999d88.
21:03:31 ANR9999D SSTRANS(580): Unexpected next frame sequence number 2
         - aggregate may already be open.
21:03:31 ANR0530W Transaction failed for session 11036 for node
         IDXANALYZER (WinNT) - internal server error detected.

The client is a Windows NT system which now has 4.1.2.12 TSM client
code. The server runs under OS/390 and is at level 3.7.4.0. Are there
any further suggestions for resolving this without stopping backups
for a few days in order to run audit db?