[RMXP] Problem draw variable

[From]

Hello ^^
I would like to appear on the menu, the number of a variable, and I made this script:

    #===================================================

    # - CLASS Begins

    #===================================================

 

    class Window_ExSkill < Window_Base

       

      def initialize

        super(0, 0, 160,67)

        self.contents = Bitmap.new(width - 32, height - 32)

          refresh

        end

       

        def refresh

        self.contents = Bitmap.new(width - 32, height - 32)

        self.contents.font.name = "Lucida Fax"

        self.contents.font.size = 22

        self.contents.font.color = crisis_color

        self.contents.draw_text(0, 0, 33, 33, "Ex:")

        self.contents.font.name = "Georgia"

        self.contents.font.color = normal_color

        self.contents.draw_text(35, 0, 70, 33, $game_variables[32])

      end

      #

    #---------------------------------------------------------------------------------   

 

    end

    #===================================================

    # - CLASS Ends

    #===================================================

When I enter the menu, it gives me error in this string:

    self.contents.draw_text(35, 0, 70, 33, $game_variables[32])

I do not understand what is the error ... can you give me a hand?

 

[regi]

The last argument should be a string, so try:

$game_variables[32].to_s