Index: /trunk/MagicSoft/Mars/mhcalib/MHCalibrationChargeCam.cc
===================================================================
--- /trunk/MagicSoft/Mars/mhcalib/MHCalibrationChargeCam.cc	(revision 6885)
+++ /trunk/MagicSoft/Mars/mhcalib/MHCalibrationChargeCam.cc	(revision 6886)
@@ -1318,7 +1318,9 @@
   pix.CreateGraphEvents();
   TGraph *gr = pix.GetGraphEvents();
-
-  xaxe2->SetTitle(gr->GetXaxis()->GetTitle());
-  yaxe2->SetTitle(gr->GetYaxis()->GetTitle());  
+  if (gr)
+  {
+      xaxe2->SetTitle(gr->GetXaxis()->GetTitle());
+      yaxe2->SetTitle(gr->GetYaxis()->GetTitle());
+  }
 
   null2->Draw();