Check your daemon i active or not., if on unix systems.
ps -ef | grep dsm
should show " dsmc sched "  alive.





"DDA.RFC-822=ADSM-L AT VM.MARIST DOT EDU/P=Internet/A= /C=us" on 08/17/2000 
11:49:42 AM
Please respond to "DDA.RFC-822=ADSM-L AT VM.MARIST DOT EDU/P=Internet/A= /C=us" 
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Subject: Possible reasons for "Missed" backups?

Using the QUERY EVENT command, I see a list of completed, missed, and failed
backups.

I assume that the 'missed' are due to a defunct/inactive client scheduler,
or a loss of connectivity to the host.

Are there other possible reasons, perhaps scheduling oriented or otherwise,
to explain why a client is 'missed'?