db2 uninterrupted backup script

Hi All,

i was trying to take the db2 uninterrupted backup using the following syntax,

db2 backup database SPT online to /dev/rmt1 WITHOUT PROMPTING

when i am triggering this query its throwing following error

SQL2035N The warning condition "2031" was encountered while executing the

utility in non-interrupt mode.

Is there any standard procedure or script which i can trigger using crontab for DB2 unattended backup.

Thanks

Rahul