ORA-23401: materialized view "string"."string" does not exist
Cause : A materialized view name was given to dbms_mview.refresh that is not in sys.snap$ or its associated views.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Provide a materialized view name that is in sys.snap$, all_mviews or user_mviews.
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.