ORA-25235: fetched all messages in current transaction
Cause : The NEXT_TRANSACTION navigation option was used in a dequeue when there were no more messages that belong to the same transaction.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Use the NEXT_TRANSACTION navigation option to move to the next also use the FIRST_MESSAGE option to start from the head of the queue again.
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.