compilation error

I want to traverse a binary search tree and output
each node-item.
The following does not compile but I have no idea why not.
The actual argument "v" has type INTEGER_32.
See error message below.

class
	APPLICATION
create
	make
feature -- Initialization
	make is
			-- Run application.
		local
			tree: MY_TREE [INTEGER]
		do
			create tree.make (500)
			tree.put (200)
			tree.put (100)
			tree.put (150)
			tree.put (125)
			tree.put (600)
			tree.put (550)
			tree.put (800)
			tree.put (700)
			tree.put (650)
			tree.put (750)
			tree.put (725)
			tree.i_infix
		end
end -- class APPLICATION


class
	MY_TREE [G -> COMPARABLE]
inherit
	BINARY_SEARCH_TREE [G]
		redefine
			node_action
		end
create
	make
feature -- Cursor movement
	node_action (v: like item) is
			-- Perfom action on item.
		do
			io.put_integer (v)
			io.put_character (' ')
		end
invariant
	invariant_clause: True -- Your invariant here
end -- class MY_TREE



Error code: VUAR(2)
Type error: non-conforming actual argument in feature call.
What to do: make sure that type of actual argument conforms to type
   of corresponding formal argument.

Class: MY_TREE [G -> COMPARABLE]
Feature: node_action
Called feature: put_integer (i: INTEGER_32) from STD_FILES
Argument name: i
Argument position: 1
Actual argument type: Generic #1
Formal argument type: INTEGER_32
Line: 32
       do
->      io.put_integer (v)
         io.put_character (' ')





Thanks a lot
Roman