diff -u -r1.18 -r1.19
--- SiSensor.java	5 Dec 2007 01:27:38 -0000	1.18
+++ SiSensor.java	6 Dec 2007 22:27:49 -0000	1.19
@@ -307,12 +307,20 @@

     
     public IIdentifierHelper getIdentifierHelper()
     {

-        List<DeSubdetector> subdet = findAncestors(DeSubdetector.class);
-        if ( subdet.size() == 0 )

+        IDetectorElement search = getParent();
+        while (search != null)

         {

-            throw new RuntimeException("Can't find DeSubdetector for SiSensor!");

+            if (search.getIdentifierHelper() != null)
+                return search.getIdentifierHelper();
+            search = search.getParent();

         }

-        return subdet.get(0).getIdentifierHelper();

+        //List<DeSubdetector> subdet = findAncestors(DeSubdetector.class);
+        //if ( subdet.size() == 0 )
+        //{
+        //    throw new RuntimeException("Can't find DeSubdetector for SiSensor!");
+        //}
+        //return subdet.get(0).getIdentifierHelper();
+        return null;

     }
     
     /**