RMAN-06164
        warning: no channel of required type allocated to recover datafile number
        
        
        Cause
        A RECOVER command could not proceed because incremental backup sets or archived log backup sets exist on a device type that has not been allocated.
        Action
        Use the LIST command to determine which device type is needed, then allocate a channel of that type.
        
     
    
    
        RMAN-06164
        warning: no channel of required type allocated to recover datafile number
        
        
        Cause
        A RECOVER command could not proceed because incremental backup sets or archived log backup sets exist on a device type that has not been allocated.
        Action
        Use the LIST command to determine which device type is needed, then allocate a channel of that type.
        
     
    
    
        RMAN-06164
        warning: no channel of required type allocated to recover datafile number
        
        
        Cause
        A RECOVER command could not proceed because incremental backup sets or archived log backup sets exist on a device type that has not been allocated.
        Action
        Use the LIST command to determine which device type is needed, then allocate a channel of that type.