error when transfer the notification owner ship by API "wf_notification.transfer"

Hi experts
When we transfer the notification owner ship　by API "wf_notification.transfer "
the following error occurred

SQL>exec wf_notificaiton.transfer(5386963,'BEU-000200900301');
BEGIN wf_notification.transferr(5386963,'BEU-000200900301');END

error at line 1
ORA-20008 unable to get the value
ORA-06512: at "APPS.WF_NOTIFICATION", line 4525
ORA-06512: at line 1

Could you tell me how to trobleshooting it?

Looking forward for your reply
Thanks&Regards
shuangfei


I have already get the following SQL result
1.Select line, text
from dba_source
where name = 'WF_NOTIFICATION'
and line between 4500 and 4550;


LINE TEXT
4500 "--   Transfer a notification, identified by NID to another user. Validate"