ORA-26666: cannot alter STREAMS process string
Cause : An attempt was made to alter a STREAMS process that is currently running.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Stop the STREAMS process and reissue the command.
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.