ORA-27160: process requested to perform operation
Cause : The current process was requested to perform an operation by another process.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
This is used internally; no action is required.
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.