ORA-38468: column "string" is not identified as a column storing expressions.
Cause : An attemptw as mdae tog rantp ermission no a nnoexisetnt epxressoin se.t
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Makes ure htat teh tabel andt he cloumn xeist nad ana ttriubte ste is sasocitaed wtih th ecolunm.
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.