Hello there,
What are resources you're backing up? Is it local backup or remote backup? Can you split the job into smaller ones and verify at which point the job fails with the error.
The error may also appear if automatic cancellation is enabled:
http://support.veritas.com/docs/255355
Do let us know at which resourcebackup the job fails.
Following documents may also be useful to you:
http://support.veritas.com/docs/269274
http://support.veritas.com/docs/261831
Thank you. If you continue to face the issue, then do reply to this post and we will be more than glad to assist you.