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IMPORTANT: Counter Class Not Compilling

IMPORTANT: Counter Class Not Compilling

(OP)
Hi i am very new to Eiffel but what i am doing is trying to write a COUNTER class, when i try to compile this it gives the following error
"

Error code: VD27
Configuration error: There is an inconsistency between the Root clause
  of the ecf file and the creation clause of the system's root
  class
What to do:
  1) If the system's root class has a creation procedure: make
     sure that the name listed in the Root clause is that of a
     feature which is a creation procedure of the root class
  2) If the system's root class does not have a creation procedure:
     make sure that that the Root clause does not list a creation
     procedure.
Root class: COUNTER
Invalid procedure name: value "

The code i am using for this is:



indexing
    description    : "System's root class"
    date: "$Date$"
    revision: "$Revision$"

class
    COUNTER
feature -- Initialization

     value : INTEGER

    increment is
    do
        value := value + 1
    end


end -- class COUNTER

The code has been taken from a book but can somebody tell me why this occurs. It read that this class does not have a creation procedure: the Eiffel rules ensure that the value attribute will be initialized to 0, as required.  Can somebdody tell me why this is still giving me erros.

RE: IMPORTANT: Counter Class Not Compilling

You need to precise the root class and the creation routine of your system.

That is to say, the main entry point.
you can have for instance

class
    APPLICATION
create
    make

feature -- Initialization
    make is
        -- Instanciate application
      local
         c: COUNTER
      do
         create c
         c.increment
         c.increment
         c.increment
         io.put_string ("c=")
         io.put_integer (c.value)
         io.put_new_line
      end
end

Hope this helps.

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