ORA-31644: unable to position to block number string in dump file "string"
Cause : Export or Import was unable to position its file pointer to a specific block within the dump file. This message is usually followed by device messages from the operating system.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Take appropriate action based on the device 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.