RMAN-06818
        warning: last archived log from primary database not received at standby database
        
        
        Cause
        An archived log was switched at the primary database during backup at the standby database and this log was not shipped to the standby database. The backup created at the standby database will need more logs to recover.
        Action
        Check whether the standby database is configured correctly to receive logs from the primary database.
        
     
    
    
        RMAN-06818
        warning: last archived log from primary database not received at standby database
        
        
        Cause
        An archived log was switched at the primary database during backup at the standby database and this log was not shipped to the standby database. The backup created at the standby database will need more logs to recover.
        Action
        Check whether the standby database is configured correctly to receive logs from the primary database.
        
     
    
    
        RMAN-06818
        warning: last archived log from primary database not received at standby database
        
        
        Cause
        An archived log was switched at the primary database during backup at the standby database and this log was not shipped to the standby database. The backup created at the standby database will need more logs to recover.
        Action
        Check whether the standby database is configured correctly to receive logs from the primary database.