diff --git a/plugins/CuraEngineBackend/CuraEngineBackend.py b/plugins/CuraEngineBackend/CuraEngineBackend.py
index 1cb0e63122..a2b049277f 100644
--- a/plugins/CuraEngineBackend/CuraEngineBackend.py
+++ b/plugins/CuraEngineBackend/CuraEngineBackend.py
@@ -157,6 +157,8 @@ class CuraEngineBackend(Backend):
             if self._message:
                 self._message.hide()
                 self._message = None
+            self._message = Message(catalog.i18nc("@info:status", "Unable to slice. Please check your setting values for errors."))
+            self._message.show()
             return #No slicing if we have error values since those are by definition illegal values.
         # Remove existing layer data (if any)
         for node in DepthFirstIterator(self._scene.getRoot()):
diff --git a/plugins/USBPrinting/PrinterConnection.py b/plugins/USBPrinting/PrinterConnection.py
index c599cfdf1d..1ce69a3c55 100644
--- a/plugins/USBPrinting/PrinterConnection.py
+++ b/plugins/USBPrinting/PrinterConnection.py
@@ -347,15 +347,17 @@ class PrinterConnection(OutputDevice, QObject, SignalEmitter):
 
     @pyqtSlot(int)
     def heatupNozzle(self, temperature):
+        Logger.log("d", "Setting nozzle temperature to %s", temperature)
         self._sendCommand("M104 S%s" % temperature)
 
     @pyqtSlot(int)
     def heatupBed(self, temperature):
+        Logger.log("d", "Setting bed temperature to %s", temperature)
         self._sendCommand("M140 S%s" % temperature)
 
     @pyqtSlot("long", "long","long")
     def moveHead(self, x, y, z):
-        print("Moving head" , x , " ", y , " " , z)
+        Logger.log("d","Moving head to %s, %s , %s", x, y, z)
         self._sendCommand("G0 X%s Y%s Z%s"%(x,y,z))
 
     @pyqtSlot()
diff --git a/resources/qml/WizardPages/UltimakerCheckup.qml b/resources/qml/WizardPages/UltimakerCheckup.qml
index b3013be5de..5f1ab3ee2e 100644
--- a/resources/qml/WizardPages/UltimakerCheckup.qml
+++ b/resources/qml/WizardPages/UltimakerCheckup.qml
@@ -262,7 +262,7 @@ Item
                     if(printer_connection != null)
                     {
                         bedTempStatus.text = catalog.i18nc("@info:progress","Checking")
-                        printer_connection.printer.heatupBed(60)
+                        printer_connection.heatupBed(60)
                         wizardPage.bed_target_temp = 60
                     }
                 }