From 1c7344fb92319c366f3d64f422bb05531d389b82 Mon Sep 17 00:00:00 2001
From: Jaime van Kessel <nallath@gmail.com>
Date: Fri, 16 Mar 2018 15:58:29 +0100
Subject: [PATCH] Fix for monitor stage ocasionally crashing

---
 plugins/MonitorStage/MonitorStage.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/plugins/MonitorStage/MonitorStage.py b/plugins/MonitorStage/MonitorStage.py
index ed84a8d2ce..931c205fff 100644
--- a/plugins/MonitorStage/MonitorStage.py
+++ b/plugins/MonitorStage/MonitorStage.py
@@ -48,7 +48,11 @@ class MonitorStage(CuraStage):
             new_output_device = Application.getInstance().getMachineManager().printerOutputDevices[0]
             if new_output_device != self._printer_output_device:
                 if self._printer_output_device:
-                    self._printer_output_device.printersChanged.disconnect(self._onActivePrinterChanged)
+                    try:
+                        self._printer_output_device.printersChanged.disconnect(self._onActivePrinterChanged)
+                    except TypeError:
+                        # Ignore stupid "Not connected" errors.
+                        pass
 
                 self._printer_output_device = new_output_device