_errorsLastUpdateTime = System.currentTimeMillis();
	private void exec(String command) throws IOException {		Message.debug("launching '"+command+"'");		_process = Runtime.getRuntime().exec(command);		_in = new InputStreamReader(_process.getInputStream());		_err = new InputStreamReader(_process.getErrorStream());		_out = new PrintWriter(_process.getOutputStream());				_errorsReader = new Thread() {							public void run() {								int c;								try {									while (_err != null && (c = _err.read()) != -1) {										_errors.append((char)c);									}								} catch (IOException e) {								}							}						};		_errorsReader.start();	}