ORA-23410: materialized view "string"."string" is already in a refresh group
Cause : A materialized view of the same name is already in a refresh group.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Subtract the materialized view from the current refresh group and add it to its new refresh group, or combine the two refresh groups into a single refresh group.
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.