# File rddc_update.rb, line 4
  def old_return_code
    if @already_found_old_return_code == nil then
      #reading old return code
      old_return = Rddc_xml_file.new
      old_return.parse_file(@conf.get_option("rddc_values_file"), "old_return")
      @already_found_old_return_code = old_return.get_value("old_return_code")
    end
    return @already_found_old_return_code
  end