ORA-25262: agent name cannot be NULL if address is a multi-consumer queue
Cause : The name for the agent in the LISTEN call was not specified when the agent address was a multi-consumer queue.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Specify a non-NULL name for the agent.
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.