From 89b601791d106780c7655371a34d1ef70a5c53cc Mon Sep 17 00:00:00 2001
From: fieldOfView <aldo@fieldofview.com>
Date: Thu, 21 Jul 2016 09:55:08 +0200
Subject: [PATCH] Fix possible error when a printer fails to load

CURA-1758
---
 cura/Settings/MachineManager.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py
index 6820cbcd2c..9fe60f3ef1 100644
--- a/cura/Settings/MachineManager.py
+++ b/cura/Settings/MachineManager.py
@@ -58,7 +58,7 @@ class MachineManager(QObject):
         if active_machine_id != "":
             # An active machine was saved, so restore it.
             self.setActiveMachine(active_machine_id)
-            if self._global_container_stack.getProperty("machine_extruder_count", "value") > 1:
+            if self._global_container_stack and self._global_container_stack.getProperty("machine_extruder_count", "value") > 1:
                 # Make sure _active_container_stack is properly initiated
                 ExtruderManager.getInstance().setActiveExtruderIndex(0)