Index: trunk/FACT++/scripts/Main.js
===================================================================
--- trunk/FACT++/scripts/Main.js	(revision 14885)
+++ trunk/FACT++/scripts/Main.js	(revision 14886)
@@ -464,5 +464,5 @@
     if (i>0 && observations[i].start <= observations[i-1].start)
     {
-        throw new Error("Start time '"+utc.toUTCString()+
+        throw new Error("Start time '"+ observations[i].start.toUTCString()+
                         "' in row "+i+" exceeds start time in row "+(i-1));
     }