public App open() { if (Settings.isWindows() || Settings.isLinux()) { int pid = _osUtil.openApp(_appName); _pid = pid; Debug.history("App.open " + this.toString()); if (pid == 0) { Debug.error("App.open failed: " + _appName + " not found"); return null; } } else { Debug.history("App.open " + this.toString()); if (_osUtil.openApp(_appName) < 0) { Debug.error("App.open failed: " + _appName + " not found"); return null; } } return this; }