ORA-16573: attempt to change configuration file for an enabled broker configuration
Cause : The Data Guard broker configuration file parameter was currently in use because broker management of the configuration was enabled. The attempt to alter that parameter was rejected.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Disable the configuration and shut down the Data Guard broker before changing this value. Be sure to rename the configuration file at the OS level to match the new value before reenabling broker management of the configuration.
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.