ORA-25014: cannot change the value of a PARENT reference variable
Cause : Parent values can only be read and not changed.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Do not attempt to change a Parent variable.
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.