ORA-13918: Updating system alert with reason_id string failed; previous alert not found
Cause : System Error: An attempt to update a system alert failed. The alert was improperly cleared from WRI$_ALERT_OUTSTANDING.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Do not delete from WRI$_ALERT_OUTSTANDING. If this condition repeats, please contact Oracle Support.
Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.