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.

update : 19-08-2017
ORA-16647

ORA-16647 - could not start more than one observer
ORA-16647 - could not start more than one observer

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    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.