- TParticle *part = MCpart->Particle();
-
- Int_t iS = TMath::Abs(part->GetPdgCode());
-
- if(iS==AliPID::ParticleCode(AliPID::kElectron)){
+ if (MCpart != NULL) { // protect against label-0 track (initial proton in Pythia events)
+ TParticle *part = MCpart->Particle();
+ Int_t iS = TMath::Abs(part->GetPdgCode());
+
+ if(iS==AliPID::ParticleCode(AliPID::kElectron)){