Index: /trunk/FACT++/scripts/CheckUnderflow.js
===================================================================
--- /trunk/FACT++/scripts/CheckUnderflow.js	(revision 14969)
+++ /trunk/FACT++/scripts/CheckUnderflow.js	(revision 14970)
@@ -136,5 +136,5 @@
     dim.wait("MCP", "Idle", 3000);
 
-    var nn = runs.data[0]>0 ? runs.data[1].reduce(Func.max) : -1;
+    var nn = runs.data && runs.data[0]>0 ? runs.data[1].reduce(Func.max) : -1;
     if (nn>0)
     {