Index: trunk/FACT++/scripts/Main.js
===================================================================
--- trunk/FACT++/scripts/Main.js	(revision 14773)
+++ trunk/FACT++/scripts/Main.js	(revision 14774)
@@ -462,5 +462,5 @@
     
     // check if the start date given by the user is increasing.
-    if (i>0 && observations[i].utc <= observations[i-1].utc)
+    if (i>0 && observations[i].start <= observations[i-1].start)
     {
         throw new Error("Start time '"+utc.toUTCString()+