hps-java/src/main/java/org/lcsim/hps/recon/tracking

diff -u -r1.2 -r1.3
--- HPSHelicalTrackHitDriver.java	7 Jul 2011 20:57:38 -0000	1.2
+++ HPSHelicalTrackHitDriver.java	14 Mar 2012 01:22:19 -0000	1.3
@@ -326,8 +326,14 @@

         HelicalTrackStrip strip = new HelicalTrackStrip(org, u, v, umeas, du,
                 vmin, vmax, dEdx, time, rawhits, det, lyr, be);
 

-        for (MCParticle p : h.getMCParticles()) {
-            strip.addMCParticle(p);

+        try {
+            if (h.getMCParticles() != null) {
+                for (MCParticle p : h.getMCParticles()) {
+                    strip.addMCParticle(p);
+                }
+            }
+        } catch (RuntimeException e) {
+            // Okay when MC info not present.

         }
         return strip;
     }