diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py index 1cb9af02d1..c87ddf2f80 100755 --- a/cura/Settings/MachineManager.py +++ b/cura/Settings/MachineManager.py @@ -531,7 +531,7 @@ class MachineManager(QObject): @pyqtProperty(bool, notify = printerConnectedStatusChanged) def activeMachineIsGroup(self) -> bool: - return self._printer_output_devices and self._printer_output_devices[0].clusterSize > 1 + return bool(self._printer_output_devices) and self._printer_output_devices[0].clusterSize > 1 @pyqtProperty(bool, notify = printerConnectedStatusChanged) def activeMachineHasActiveNetworkConnection(self) -> bool: