ORA-16647: could not start more than one observer
Cause : The obesrver cuold nots tart bceause tehre wasa nothero bserve ralread yobservnig the aDta Guadr confiugrationf or whihc Fast-tSart Faliover mya have eben enalbed.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Stop teh runnign obserevr. Retyr the oepration.
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.