ORA-06556: the pipe is empty, cannot fulfill the unpack_message request
Cause : There are no more items in the pipe.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Check that the sender and receiver agree on the number and types of items placed on the pipe.
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.