message: Debug changes / capture null ptr
diff: @@ -381,6 +381,7 @@ Bool_t AliMultSelectionCalibrator::Calibrate() {
  Double_t lEventsPerSecond = 0;
  AliMultVariable *lVtxZLocalPointer = fInput -> GetVariable("fEvSel_VtxZ");
  + if( ! lVtxZLocalPointer ) cout<<"PROBLEM singling out vtx-Z variable"<<endl;
  for(Long64_t iEv = 0; iEv<fTree->GetEntries(); iEv++) {
  if ( iEv % 100000 == 0 ) {
  @@ -463,6 +464,7 @@ Bool_t AliMultSelectionCalibrator::Calibrate() {
  for(Int_t iVar=0; iVar<AliMultInput::kNVariables; iVar++) {
  if(VarDoAutocalib[iVar]){
  AliMultVariable *v1 = fInput->GetVariable(iVar);
  + if(!v1) cout<<"PROBLEM finding this variable"<<endl;
  hCalibVtx[lIndex][iVar]->Fill( lVtxZLocalPointer->GetValue(), v1->IsInteger() ? v1->GetValueInteger() : v1->GetValue() );
  }
  }
  