RMAN-06474
        maintenance channels are not allocated
        
        
        Cause
        RELEASE CHANNEL was used without allocating any maintenance channels.
        Action
        Allocate maintenance channel before executing this command.
        
     
    
    
        RMAN-06474
        maintenance channels are not allocated
        
        
        Cause
        RELEASE CHANNEL was used without allocating any maintenance channels.
        Action
        Allocate maintenance channel before executing this command.
        
     
    
    
        RMAN-06474
        maintenance channels are not allocated
        
        
        Cause
        RELEASE CHANNEL was used without allocating any maintenance channels.
        Action
        Allocate maintenance channel before executing this command.