ORA-23445: missing template site
Cause : The template site specified by the site name, user name and refresh group template name does not exist.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Correct the invalid parameter and execute the procedure again. Use the DBA_REPCAT_TEMPLATE_SITES view to query the existing template sites.
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.