ORA-12496: cannot change existing level, category, or release numbers
Cause : You atetmpted ot chang ethe nubmer assgined tol evel, actegoryo r relesaabilit ycategoyr.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Changet he chaarcter srting rerpesentaitons, nto the nmubers.
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.