Fix by Ruben

diff --git a/ZDC/AliZDCDigitizer.cxx b/ZDC/AliZDCDigitizer.cxx
index 33787e358622f51a4c5f682294fadb2fbc141d2b..2468acb0c492e9f9a8ac41a0571df871b014c9c0 100644 (file)
--- a/ZDC/AliZDCDigitizer.cxx
+++ b/ZDC/AliZDCDigitizer.cxx
@@ -291,7 +291,11 @@ void AliZDCDigitizer::Digitize(Option_t* /*option*/)
     if(genHeader->InheritsFrom(AliGenHijingEventHeader::Class())) hijingHeader = dynamic_cast <AliGenHijingEventHeader*> (genHeader);
     else if(genHeader->InheritsFrom(AliGenCocktailEventHeader::Class())){
       TList* listOfHeaders = ((AliGenCocktailEventHeader*) genHeader)->GetHeaders();
-      hijingHeader = dynamic_cast <AliGenHijingEventHeader*> (listOfHeaders->FindObject("Hijing"));
+      if(listOfHeaders) hijingHeader = dynamic_cast <AliGenHijingEventHeader*> (listOfHeaders->FindObject("Hijing"));
+      else{
+        AliWarning(" No list of headers from generator -> skipping event\n");
+       continue;
+      }
     }
     if(!hijingHeader) continue;