ORA-16135: Invalid LOG_ARCHIVE_CONFIG modification while in protected mode
Cause : The LOG_ARCHIVE_CONFIG parameter can not be modified while any RAC instance is open in either maximum protection or maximum availability mode. Also, the parameter can not be modified in such way that would cause all destinations to fail while in maximum protection mode.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Make the modification before the database is opened by any instance.
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.