I've rebuilt the server and configured the TLD via the wizard. All appeared to go well and the Event Log is clean.
When trying to run a backup I get the following.
11/06/2015 11:12:35 - requesting resource Any
11/06/2015 11:12:35 - requesting resource veritas-backup.NBU_CLIENT.MAXJOBS.veritas-backup
11/06/2015 11:12:35 - requesting resource veritas-backup.NBU_POLICY.MAXJOBS.Test-Backup
11/06/2015 11:12:35 - awaiting resource Any Reason: Drives are in use., Media Server: veritas-backup, Robot Number: 0, Robot Type: TLD, Media ID: N/A, Drive Name: N/A, Volume Pool: NetBackup, Storage Unit: veritas-backup-hcart3-robot-tld-0, Drive Scan Host: N/A
11/06/2015 11:20:56 - granted resource veritas-backup.NBU_CLIENT.MAXJOBS.veritas-backup
11/06/2015 11:20:56 - granted resource veritas-backup.NBU_POLICY.MAXJOBS.Test-Backup
11/06/2015 11:20:56 - granted resource AG10L2
11/06/2015 11:20:56 - granted resource HP.ULTRIUM3-SCSI.000
11/06/2015 11:20:56 - granted resource veritas-backup-hcart3-robot-tld-0
11/06/2015 11:20:57 - started process bpbrm (1044)
11/06/2015 11:20:57 - connecting
11/06/2015 11:20:57 - connected; connect time: 00:00:00
11/06/2015 11:20:59 - mounting AG10L2
11/06/2015 11:27:40 - Error bptm(pid=3748) error requesting media, TpErrno = Robot operation failed
11/06/2015 11:27:40 - Warning bptm(pid=3748) media id AG10L2 load operation reported an error
11/06/2015 11:27:48 - Error bptm(pid=3748) NBJM returned an extended error status: resource request failed (800)
11/06/2015 11:27:48 - Error bpbrm(pid=1044) from client veritas-backup: ERR - bpbkar exiting because backup is aborting
11/06/2015 11:27:40 - current media AG10L2 complete, requesting next media Any
11/06/2015 11:27:51 - end writing
extended error status has been encountered, check logs(252)