hps-java/src/main/java/org/lcsim/hps/evio

diff -u -r1.14 -r1.15
--- TestRunTriggeredReconToLcio.java	9 Apr 2013 22:22:12 -0000	1.14
+++ TestRunTriggeredReconToLcio.java	19 Apr 2013 16:57:04 -0000	1.15
@@ -116,9 +116,15 @@

             trackerHits = event.getSimTrackerHits(trackerCollectionName);
         }
         if (ClockSingleton.getClock() % 500 == 0) {

-            mcParticles500 = event.getMCParticles();
-            ecalHits500 = event.getSimCalorimeterHits(ecalCollectionName);
-            trackerHits500 = event.getSimTrackerHits(trackerCollectionName);

+            if(event.hasCollection(MCParticle.class)) { 
+                mcParticles500 = event.getMCParticles();            
+                ecalHits500 = event.getSimCalorimeterHits(ecalCollectionName);
+                trackerHits500 = event.getSimTrackerHits(trackerCollectionName);
+            } else {
+                mcParticles500 = null;
+                ecalHits500 = null;
+                trackerHits500 = null;
+            }

         }