From 1471a6815fd9a37b57b87542e44fc4abac9788b1 Mon Sep 17 00:00:00 2001
From: Arjen Hiemstra <ahiemstra@heimr.nl>
Date: Wed, 27 May 2015 16:25:39 +0200
Subject: [PATCH] Do not slice if there is any setting with an error value

Fixes #7
---
 plugins/CuraEngineBackend/CuraEngineBackend.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/plugins/CuraEngineBackend/CuraEngineBackend.py b/plugins/CuraEngineBackend/CuraEngineBackend.py
index 7c52a3c6cb..45a2148892 100644
--- a/plugins/CuraEngineBackend/CuraEngineBackend.py
+++ b/plugins/CuraEngineBackend/CuraEngineBackend.py
@@ -110,6 +110,9 @@ class CuraEngineBackend(Backend):
         if not objects:
             return #No point in slicing an empty build plate
 
+        if kwargs.get("settings", self._settings).hasErrorValue():
+            return #No slicing if we have error values since those are by definition illegal values.
+
         self._slicing = True
         self.slicingStarted.emit()