ORA-16571: Data Guard configuration file creation failure
Cause : The Data Guard broker was unable to create the configuration file on permanent storage.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Verify space, permissions and filename as indicated by the dg_broker_config_file[1|2] parameters and retry.
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.