Oracle Error ORA-16217: prepare to switchover has not completed

Oracle Error Message

ORA-16217: prepare to switchover has not completed

Reason for the Error

An ALTER DATABASE PREPARE TO SWITCHOVER command was issued, but the prepare activity did not complete.

Solution

Verify that the standby was prepared properly. You may cancel the prepare and perform an unprepared switchover which requires a database link to complete. Or reissue the prepare operation on the standby.