From 06060af419ad58e7f0263f895f87456d62c03ddf Mon Sep 17 00:00:00 2001
From: Timothy Lim <timothy_lim@outlook.com>
Date: Thu, 20 Oct 2016 08:18:43 +0200
Subject: [PATCH] Add safety check

---
 js/questionset.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/js/questionset.js b/js/questionset.js
index 7aa037b..ac75666 100644
--- a/js/questionset.js
+++ b/js/questionset.js
@@ -212,7 +212,15 @@ H5P.QuestionSet = function (options, contentId, contentData) {
 
     // Retrieve questions and indexes
     questions = questionOrdering.map(d => d[0]);
-    var newOrder = questionOrdering.map(d => questionOrder[d[1]])
+    
+    // Use the previous question order if it exists
+    var newOrder;
+    if (questionOrder) {
+      newOrder = questionOrdering.map(d => questionOrder[d[1]]);
+    }
+    else{
+      newOrder = questionOrdering.map(d => d[1]);
+    }
 
     return {
       questions:questions,