diff -u -r1.3 -r1.4
--- PerfectIdentifier.java	23 Jul 2006 18:24:47 -0000	1.3
+++ PerfectIdentifier.java	17 Nov 2006 21:16:37 -0000	1.4
@@ -13,7 +13,7 @@

 
 /**
  * 

- * @version $Id: PerfectIdentifier.java,v 1.3 2006/07/23 18:24:47 mcharles Exp $

+ * @version $Id: PerfectIdentifier.java,v 1.4 2006/11/17 21:16:37 mcharles Exp $

  */
 
 public class PerfectIdentifier extends Driver

@@ -26,7 +26,10 @@

 	List<Cluster> inputClusterList = event.get(Cluster.class, m_inputClusterListName);
 	List<ReconstructedParticle> outputParticleList = new Vector<ReconstructedParticle>();
 	List<MCParticle> mcList = event.get(MCParticle.class, m_mcName);

-	List<Track> trackList = event.get(Track.class, m_inputTrackListName);

+	List<Track> trackList = null;
+	if (m_inputTrackListName != null) {
+	    trackList = event.get(Track.class, m_inputTrackListName);
+	}

 	
 	for (Cluster clus : inputClusterList) {
 	    // Identify

@@ -35,14 +38,19 @@

 	    LocalReconstructedParticle part = new LocalReconstructedParticle();
 	    part.addCluster(clus);
 	    // Match track(s):

-	    for (Track currentTrack : trackList) {
-		if (currentTrack instanceof ReconTrack) {
-		    ReconTrack cheatTrack = (ReconTrack)(currentTrack);
-		    Particle cheatTrackParticle = cheatTrack.getMCParticle();
-		    if (cheatTrackParticle == truthID) {
-			part.addTrack(currentTrack);

+	    if (trackList != null) {
+		// Use supplied track list
+		for (Track currentTrack : trackList) {
+		    if (currentTrack instanceof ReconTrack) {
+			ReconTrack cheatTrack = (ReconTrack)(currentTrack);
+			Particle cheatTrackParticle = cheatTrack.getMCParticle();
+			if (cheatTrackParticle == truthID) {
+			    part.addTrack(currentTrack);
+			}

 		    }
 		}

+	    } else {
+		// Skip track list

 	    }
             // This step has to be done last, since addTrack() now over-writes kinematic info
 	    part.setEnergy(truthID.getEnergy());