ORA-12524: TNS:listener could not resolve HANDLER_NAME given in connect descriptor
Cause : The HANDLER_NAME in the CONNECT_DATA was not found in the listener's tables for the specified SERVICE_NAME and INSTANCE_NAME.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Check to make sure that the HANDLER_NAME specified is correct.
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.