def error(self, interface_id, errorcode, msg):
        """When some error occurs the CCU / Homegear will send it's error message here"""
        LOG.debug("RPCFunctions.error: interface_id = %s, errorcode = %i, message = %s" % (
            interface_id, int(errorcode), str(msg)))
        if self.systemcallback:
            self.systemcallback('error', interface_id, errorcode, msg)
        return True
When some error occurs the CCU / Homegear will send it's error message here