ORA-24199: message store is overflow
Cause : An attemp was made to access too many messages at the same time.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Use the CLEAN procedure to clean up some of the messages.
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.