ORA-16523
        Switchover or failover operation requires client connection to instance "string".
        
        
        Cause
        The switchover or failover operation required the client to connect to the apply instance of the specified database.
        Action
        Connect to the specified instance and retry the command.
        
     
    
    
        ORA-16523
        operation requires the client to connect to instance "string"
        
        
        Cause
        The switchover or failover operation required 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.
        
     
    
    
        ORA-16523
        operation requires the client to connect to instance "string"
        
        
        Cause
        The switchover or failover operation required 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.