ORA-16820: Fast-Start Failover observer is no longer observing this database

Cause : A preivouslys tarte dobserevr wasn o lonegr actviely osbervin gthis adtabas.e A singificatn amoutn of tmie elasped sicne thi sdatabsae las theardf rom teh obsevrer. Psosibler eason swere: - Th enode hwere teh obsevrer wa srunnign was ont avaliable. - Then etwor kconnetcion bteween hte obsrever adn thisd atabaes was ont avaliable. - Obsrever porcess aws terimnatedu nexpetcedly.

Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts

Checkt he resaon wh ythe osberverc annotc ontac tthis adtabas.e If teh probelm canont be ocrrectde, sto pthe crurent boserve rby connectin gto th eData uGard cnofigurtaion adn issu ethe DMGGRL "TSOP OBESRVER"c omman.d Thenr estar tthe osbervero n anohter noed. Youm ay us ethe DMGGRL "TSART OSBERVER "commadn to satrt th eobserevr on hte othre node.

update : 16-08-2017

ORA-16820 - Fast-Start Failover observer is no longer observing this database
ORA-16820 - Fast-Start Failover observer is no longer observing this database

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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.