[Twisted-Python] Log level using Twistd

Hello, I am trying to modify loglevel withou result. I configure my app logging inside the tac file as: logging.basicConfig(level=logging.ERROR, format="%(asctime)s --- %(name)s - %(levelname)s - %(message)s") logfile = DailyLogFile("gdumper.log", "/var/log") application.setComponent(ILogObserver, FileLogObserver(logfile).emit) logging.basicConfig call seems do not apply as I get both log.msg and log.err messages into the log. Is there any other way to set up log level? Regards