lcsim/src/org/lcsim/util

diff -u -r1.8 -r1.9
--- OverlayDriver.java	30 Apr 2011 04:44:38 -0000	1.8
+++ OverlayDriver.java	2 May 2011 09:40:39 -0000	1.9
@@ -449,8 +449,8 @@

 			}
 		} else if (collectionType.isAssignableFrom(SimTrackerHit.class)) {
 			// SimTrackerHits

-			movedCollection = event.get(SimTrackerHit.class, collectionName);
-			for (SimTrackerHit hit : (List<SimTrackerHit>)movedCollection) {

+			movedCollection = new ArrayList<SimTrackerHit>();
+			for (SimTrackerHit hit : (List<SimTrackerHit>)event.get(SimTrackerHit.class, collectionName)) {

 				// check if hit falls into relevant readout time window
 				double hitTime = hit.getTime() + time;
 				double tofCorr = getLosTof(hit);

@@ -458,6 +458,7 @@

 					if (hitTime < signalTime + tofCorr + tofCaloOffset || hitTime > signalTime + tofCorr + timeWindow) continue;
 				}
 				((BaseSimTrackerHit)hit).setTime(hit.getTime()+time);

+				movedCollection.add(hit);

 			}
 		} else if (collectionType.isAssignableFrom(SimCalorimeterHit.class)) {
 			// SimCalorimeterHits