ORA-40776
        SCN value for 'as of' operation cannot be set to null.
        
        
        Cause
        An attempt was made to set a null value for system change number (SCN).
        Action
        Specify a non-null value for the SCN in the operation.
        
     
    
    
        ORA-40776
        SCN value for 'as of' operation cannot be set to null.
        
        
        Cause
        An attempt was made to set a null value for system change number (SCN).
        Action
        Specify a non-null value for the SCN in the operation.
        
     
    
    
        ORA-40776
        SCN value for 'as of' operation cannot be set to null.
        
        
        Cause
        An attempt was made to set a null value for system change number (SCN).
        Action
        Specify a non-null value for the SCN in the operation.