34114Backup ExecBackup Exec Alert: Job Cancellation
(Server: "servername") (Job: "Daily") The job was canceled because the response to a media request alert was Cancel, or because the alert was configured to automatically respond with Cancel, or because the Backup Exec Job Engine service was stopped.
For more information, click the following link:
http://eventlookup.veritas.com/eventlookup/EventLookup.jhtml
When a job does not start before the time window expires, it is automatically canceled.
This can also be logged when you manually cancel a job.
Happened for me because my backups grew larger than the tapes. I had an auto-response for Alert for Library Media Insert to dismiss after 2 hours.
So for me, tapes would fill up, and alert for a new tape would fire and two hours later the job was automatically cancelled.