diff -u -r1.4.2.1 -r1.4.2.2
--- SensitiveDetectorFactory.hh	14 Aug 2013 00:23:22 -0000	1.4.2.1
+++ SensitiveDetectorFactory.hh	14 Aug 2013 02:34:40 -0000	1.4.2.2
@@ -1,4 +1,4 @@

-// $Header: /cvs/lcd/lcdd/include/lcdd/detectors/SensitiveDetectorFactory.hh,v 1.4.2.1 2013/08/14 00:23:22 jeremy Exp $

+// $Header: /cvs/lcd/lcdd/include/lcdd/detectors/SensitiveDetectorFactory.hh,v 1.4.2.2 2013/08/14 02:34:40 jeremy Exp $

 
 #ifndef LCDD_DETECTORS_SENSITIVEDETECTORFACTORY_HH
 #define LCDD_DETECTORS_SENSITIVEDETECTORFACTORY_HH 1

@@ -68,7 +68,7 @@

      * Create a TrackerSD object.
      * @param[in] object The SAXObject of the detector.
      */

-    static TrackerSD* createTracker(const SAXObject* object);

+    static TrackerSD* createTracker(const SAXObject* object, const std::vector<G4String>& hitsCollections);

 
     /**
      * Compute the ecut for a detector.

diff -u -r1.4.2.2 -r1.4.2.3
--- SensitiveDetectorFactory.cc	14 Aug 2013 02:19:45 -0000	1.4.2.2
+++ SensitiveDetectorFactory.cc	14 Aug 2013 02:34:40 -0000	1.4.2.3
@@ -1,4 +1,4 @@

-// $Header: /cvs/lcd/lcdd/src/lcdd/detectors/SensitiveDetectorFactory.cc,v 1.4.2.2 2013/08/14 02:19:45 jeremy Exp $

+// $Header: /cvs/lcd/lcdd/src/lcdd/detectors/SensitiveDetectorFactory.cc,v 1.4.2.3 2013/08/14 02:34:40 jeremy Exp $

 
 // LCDD
 #include "lcdd/detectors/SensitiveDetectorFactory.hh"

@@ -121,16 +121,17 @@

             // Need to add default HitProcessors because none were specified.
             if (sensitiveDetectorTypeName == "tracker") {
                 // Default TrackerHitProcessor.

-                HitProcessorManager::instance()->getFactory("BasicTrackerHitProcessor")->createHitProcessor(sensitiveDetector);

+                sensitiveDetector->addHitProcessor(HitProcessorManager::instance()->getFactory("BasicTrackerHitProcessor")->createHitProcessor(sensitiveDetector));

             } else if (sensitiveDetectorTypeName == "calorimeter" ) {
                 // Default CalorimeterHitProcessor.

-                HitProcessorManager::instance()->getFactory("LegacyCalorimeterHitProcessor")->createHitProcessor(sensitiveDetector);

+                sensitiveDetector->addHitProcessor(HitProcessorManager::instance()->getFactory("LegacyCalorimeterHitProcessor")->createHitProcessor(sensitiveDetector));

             }
         }
 
         // Register the SensitiveDetector with the LCDDProcessor.
         std::string sensitiveDetectorName = sensitiveDetector->GetName();

-        //std::cout << "registering SD: " << sensitiveDetectorName << std::endl;

+        std::cout << "registering SD: " << sensitiveDetectorName << std::endl;
+        std::cout << "  # hit processors: " << sensitiveDetector->getHitProcessors().size() << std::endl;

         LCDDProcessor::instance()->addSensitiveDetector(sensitiveDetectorName, sensitiveDetector);
     } else {
         // This should never really happen.