def METHOD_NAME(self, error_msg):
    """Updates ICS error message
    :param error_msg: error message
    :type error_msg: str
    :return: None
    """
    if len(error_msg) > 0:
        logging.getLogger("GUI").error("DESY ICS Connection: Error %s" % error_msg)
        self.ics_enabled = False
    else:
        self.ics_enabled = True
    self.update_shutter_state()