vm ware backups failing with error 73

Hi ALL,

 

Please let me know what all details is required in this?

 

vmware backup failing with error 73 and 13

 

NBU 7.5.0.6

 

WIN 2008

 

19.09.2013 07:05:46 - Info nbjm(pid=7072) starting backup job (jobid=88609) for client T003U02F23TSV0W, policy TALANX_Full_VM_backups_UAT, schedule Full_Backup_Monday 
19.09.2013 07:05:46 - estimated 18961866 Kbytes needed
19.09.2013 07:05:46 - Info nbjm(pid=7072) started backup (backupid=T003U02F23TSV0W_1379567146) job for client T003U02F23TSV0W, policy TALANX_Full_VM_backups_UAT, schedule Full_Backup_Monday on storage unit sysmp03bks0w-robot-NEW
19.09.2013 07:05:46 - started process bpbrm (6612)
19.09.2013 07:05:51 - Info bpbrm(pid=6612) T003U02F23TSV0W is the host to backup data from    
19.09.2013 07:05:51 - Info bpbrm(pid=6612) reading file list from client       
19.09.2013 07:05:51 - connecting
19.09.2013 07:05:52 - Info bpbrm(pid=6612) starting bpbkar32 on client        
19.09.2013 07:05:52 - connected; connect time: 00:00:01
19.09.2013 07:05:53 - Error bpbrm(pid=6612) from client T003U02F23TSV0W: ERR - bpstart_notify returned 1    
19.09.2013 07:05:53 - Info bpbkar32(pid=0) done. status: 73: bpstart_notify failed       
19.09.2013 07:05:56 - Info bpbkar32(pid=0) done. status: 73: bpstart_notify failed       
19.09.2013 07:05:56 - end writing
bpstart_notify failed(73)