ORA-23374: object group "string"."string" already exists
Cause : The given database already replicates the given object group. A materialized view repgroup cannot be created at a given site where a master repgroup with the same name already exists.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Choose a different group or a different database.
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.