Index: trunk/MagicSoft/Mars/manalysis/MPadSchweizer.cc
===================================================================
--- trunk/MagicSoft/Mars/manalysis/MPadSchweizer.cc	(revision 2069)
+++ trunk/MagicSoft/Mars/manalysis/MPadSchweizer.cc	(revision 2070)
@@ -101,4 +101,8 @@
   fHSigmaPixTheta = NULL;
   fHDiffPixTheta  = NULL;
+
+  fHSigmaPedestal = NULL;
+  fHPhotons       = NULL;
+  fHNSB           = NULL;
 }
 
@@ -109,7 +113,7 @@
 MPadSchweizer::~MPadSchweizer()
 {
-  delete fHSigmaPedestal;
-  delete fHPhotons;
-  delete fHNSB;
+  if (fHSigmaPedestal != NULL) delete fHSigmaPedestal;
+  if (fHPhotons != NULL)       delete fHPhotons;
+  if (fHNSB != NULL)           delete fHNSB;
 }