From e49adcac8565b15bab237222abc6db1f306f8fd5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gina=20H=C3=A4u=C3=9Fge?= <gina@octoprint.org>
Date: Fri, 20 Oct 2017 19:22:39 +0200
Subject: [PATCH] GCO viewer: Fix error on empty layers

---
 src/octoprint/static/gcodeviewer/js/gCodeReader.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/octoprint/static/gcodeviewer/js/gCodeReader.js b/src/octoprint/static/gcodeviewer/js/gCodeReader.js
index 6f8a9e49..fb4e1325 100644
--- a/src/octoprint/static/gcodeviewer/js/gCodeReader.js
+++ b/src/octoprint/static/gcodeviewer/js/gCodeReader.js
@@ -78,6 +78,7 @@ GCODE.gCodeReader = (function(){
         percentageTree = undefined;
 
         for (var l = 0; l < model.length; l++) {
+            if (model[l] === undefined) continue;
             for (var i = 0; i < model[l].length; i++) {
                 var percentage = model[l][i].percentage;
                 var value = {layer: l, cmd: i};