X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=PWG3%2Fmuon%2FAliAnalysisTaskDimuonCFContainerBuilder.cxx;h=aacceb5d5b620131c93a71f4b3b88e0a58050f19;hb=f12dabf047497f243db3d7b57775f2f2b639d2ae;hp=ae969e4efc3316879f0811f1a4178c5e8ad9e556;hpb=b0c84a07cdb566998db94a3ba1292737ba617fc1;p=u%2Fmrichter%2FAliRoot.git

diff --git a/PWG3/muon/AliAnalysisTaskDimuonCFContainerBuilder.cxx b/PWG3/muon/AliAnalysisTaskDimuonCFContainerBuilder.cxx
index ae969e4efc3..aacceb5d5b6 100644
--- a/PWG3/muon/AliAnalysisTaskDimuonCFContainerBuilder.cxx
+++ b/PWG3/muon/AliAnalysisTaskDimuonCFContainerBuilder.cxx
@@ -1,6 +1,8 @@
 #ifndef ALIANALYSISTASKDIMUONCFCONTAINERBUILDER_CXX
 #define ALIANALYSISTASKDIMUONCFCONTAINERBUILDER_CXX
 
+/* $Id$ */
+
 #include "AliAnalysisTaskDimuonCFContainerBuilder.h"
 #include "AliStack.h"
 #include "TParticle.h"
@@ -356,6 +358,10 @@ void AliAnalysisTaskDimuonCFContainerBuilder::UserExec(Option_t *)
   
       AliESDEvent *fESD; 
       AliESDInputHandler *esdH = dynamic_cast<AliESDInputHandler*>(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler());
+      if ( ! esdH ) {
+        AliError("Cannot get input event handler");
+        return;
+      }  
       fESD = esdH->GetEvent();
       Int_t mult1 = fESD->GetNumberOfMuonTracks() ;
 
@@ -498,6 +504,10 @@ void AliAnalysisTaskDimuonCFContainerBuilder::UserExec(Option_t *)
 
     AliAODEvent *aod;
     AliAODInputHandler *aodH = dynamic_cast<AliAODInputHandler*>(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler());
+    if ( ! aodH ) {
+      AliError("Cannot get input event handler");
+      return;
+    }
     aod = aodH->GetEvent();
     Int_t ntracks=aod->GetNumberOfTracks(); 
 
@@ -505,6 +515,10 @@ void AliAnalysisTaskDimuonCFContainerBuilder::UserExec(Option_t *)
 
     if (fReadMCInfo){
       TClonesArray *mcarray = dynamic_cast<TClonesArray*> (aod->FindListObject(AliAODMCParticle::StdBranchName()));  //array of MC particles in this event
+      if ( ! mcarray ) {
+        AliError("Cannot associate MC branch");
+        return;
+      }
       for(int ii=0;ii<mcarray->GetEntries();ii++){
 	AliAODMCParticle *mctrack = (AliAODMCParticle*) mcarray->At(ii);
 	if(mctrack->GetPdgCode()!=13) continue;