ORA-23444: duplicate template parameter
Cause : The template parameter already exists for the specified refresh group template.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Correct the template parameter value and execute the procedure again. Use the DBA_REPCAT_TEMPLATE_PARMS view to verify the name of the refresh group template and parameter name.
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.