Error code

hello,

I am facing an error of 73 while executing a backup..

+ bpbackup -i -w -p DC1_AIX_BMR_PG136 -s WEEKLY_FULL3M_OFF -k PG136_NCS_BMR.DAILY_FULL_2804 -h PG136
EXIT STATUS 73: bpstart_notify failed
+ RETURE=73
+ [ 73 != 0 ]
+ exit 73
 

can any one guide what is to be done in this case..

as in what I need to check in bpstart_notify script  of client..?

how can I test bpstart_notify script  mannually..?