HELP .......... PLEASE

We are about to start the rollout of ADSM to all our Netware 3.x,
Netware 4.x and HP-UX servers using MVS V1 as the server.

When looking at the scheduled events, it seems that a status of
Completed should indicate a successful backup.   In actual fact, I have
found that this status still shows even if the backup fails on certain
files.  Perhaps they are in use and are skipped (which we deem as
acceptable) but I have also seen a backup showing Completed and the log
contains the following error messages :

ANS4089E File not found during Backup, Archive or Migrate processing.
ANS4301E Server detected system error

Both were preceded by ANS4228E Sending of object 'xxx' failed

The message manual doesn't tell me any more than the actual messages do
just see your System Administrator - which is me.

These messages were all relating to NDS objects on a Netware 4.x server.
 I'm not sure if it's ever happened with normal files.
Does anyone know if this is specific to NDS objects?

How can I find out which files have had errors, apart from having to
check the error log on every single client every day?   I'm worried that
if a file keeps getting missed that we will never have a backup of it.