partial successful backups

stream discovery is failing with error code 26, which is resulting in partial successful backups. can anyone suggest how to get rid off this issue

12/17/2013 20:28:14 - end Stream Discovery: Stream Discovery; elapsed time 0:00:00

12/17/2013 20:28:14 - begin Stream Discovery: Bare Metal Restore Save

12/17/2013 20:28:14 - started process bpbrm (pid=26779)

Operation Status: 26