ORA-16871
        fast-start failover target switch is not supported
        
        
        Cause
        Automatic switch of the fast-start failover target was not possible because the release of the observer was earlier than 12.2. Consequently, the fast-start failover target switch will not occur even though the primary database has more than one fast-start failover target configured.
        Action
        Upgrade the Oracle client home to release 12.2 and then stop and restart the observer using the DGMGRL CLI in that Oracle home.
        
     
    
    
        ORA-16871
        fast-start failover target switch is not supported
        
        
        Cause
        Automatic switch of the fast-start failover target was not possible because the release of the observer was earlier than 12.2. Consequently, the fast-start failover target switch will not occur even though the primary database has more than one fast-start failover target configured.
        Action
        Upgrade the Oracle client home to release 12.2 and then stop and restart the observer using the DGMGRL CLI in that Oracle home.
        
     
    
    
        ORA-16871
        fast-start failover target switch is not supported
        
        
        Cause
        Automatic switch of the fast-start failover target was not possible because the release of the observer was earlier than 12.2. Consequently, the fast-start failover target switch will not occur even though the primary database has more than one fast-start failover target configured.
        Action
        Upgrade the Oracle client home to release 12.2 and then stop and restart the observer using the DGMGRL CLI in that Oracle home.