if S.startswith("[") and not S.startswith("[CAPSULE."):
            if not S.startswith("[VTF.") and not S.startswith("[RULE.") and not S.startswith("[OPTIONROM."):
                raise Warning("Unknown section or section appear sequence error (The correct sequence should be [FD.], [FV.], [Capsule.], [VTF.], [Rule.], [OptionRom.])", self.FileName, self.CurrentLineNumber)
            self.__UndoToken()
            return False