diff --git a/plugins/CuraEngineBackend/CuraEngineBackend.py b/plugins/CuraEngineBackend/CuraEngineBackend.py
index 28ca793855..249b2f6cbb 100755
--- a/plugins/CuraEngineBackend/CuraEngineBackend.py
+++ b/plugins/CuraEngineBackend/CuraEngineBackend.py
@@ -217,7 +217,7 @@ class CuraEngineBackend(QObject, Backend):
             self._scene.gcode_list[build_plate_to_be_sliced] = []
             Logger.log("d", "Build plate %s has no objects to be sliced, skipping", build_plate_to_be_sliced)
             if self._build_plates_to_be_sliced:
-                self._invokeSlice()
+                return self.slice()
 
         self._stored_layer_data = []
         self._stored_optimized_layer_data[build_plate_to_be_sliced] = []
diff --git a/plugins/UM3NetworkPrinting/NetworkClusterPrinterOutputDevice.py b/plugins/UM3NetworkPrinting/NetworkClusterPrinterOutputDevice.py
index 05069d1c0d..6eb89d69a4 100644
--- a/plugins/UM3NetworkPrinting/NetworkClusterPrinterOutputDevice.py
+++ b/plugins/UM3NetworkPrinting/NetworkClusterPrinterOutputDevice.py
@@ -282,6 +282,9 @@ class NetworkClusterPrinterOutputDevice(NetworkPrinterOutputDevice.NetworkPrinte
         nodes, file_name, filter_by_machine, file_handler, kwargs = self._request_job
         output_build_plate_number = self._job_list.pop(0)
         gcode = getattr(Application.getInstance().getController().getScene(), "gcode_list")[output_build_plate_number]
+        if not gcode:  # Empty build plate
+            Logger.log("d", "Skipping empty job (build plate number %d).", output_build_plate_number)
+            return self.sendPrintJob()
 
         self._send_gcode_start = time.time()
         Logger.log("d", "Sending print job [%s] to host, build plate [%s]..." % (file_name, output_build_plate_number))