ORA-24088: AQ Agent string does not exist
Cause : This AQ Agent does not exist
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Specify a valid AQ agent. Check the DBA_AQ_AGENTS view for a list of valid aq agents
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.