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ORA-16523: Operation requires the client to connect to
instance "string".



ORA-16523: Operation requires the client to connect to instance "string"...

Answer / guest

Cause: The switchover or failover operation requires the
client to connect to the apply instance of the target database.

Action: Connect to the indicated instance and reissue the
switchover or failover command.

Please add more information about this Error

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