# File lib/Dnsruby/message.rb, line 581
    def get_exception
      exception = nil
      if (@rcode==RCode.NXDOMAIN)
        exception = NXDomain.new
      elsif (@rcode==RCode.SERVFAIL)
        exception = ServFail.new
      elsif (@rcode==RCode.FORMERR)
        exception = FormErr.new
      elsif (@rcode==RCode.NOTIMP)
        exception = NotImp.new
      elsif (@rcode==RCode.REFUSED)
        exception = Refused.new
      end
      return exception
    end