Index: trunk/Mars/mhist/MHCamEvent.cc
===================================================================
--- trunk/Mars/mhist/MHCamEvent.cc	(revision 19320)
+++ trunk/Mars/mhist/MHCamEvent.cc	(revision 19345)
@@ -127,5 +127,8 @@
 {
     if (fSum)
+    {
         delete fSum;
+        fSum = 0;
+    }
 }
 
Index: trunk/Mars/mhist/MHCamera.cc
===================================================================
--- trunk/Mars/mhist/MHCamera.cc	(revision 19320)
+++ trunk/Mars/mhist/MHCamera.cc	(revision 19345)
@@ -203,7 +203,13 @@
 {
     if (fGeomCam)
-      delete fGeomCam;
+    {
+        delete fGeomCam;
+        fGeomCam = 0;
+    }
     if (fNotify)
-      delete fNotify;
+    {
+        delete fNotify;
+        fNotify = 0;
+    }
 }