message: allowing also PID. token for fields
diff: @@ -131,7 +131,7 @@ AliNanoAODTrackMapping::AliNanoAODTrackMapping(const char * mappingString) :
  if(var == validatorString[ivalidator++]) isValid = kTRUE;
  }
  //... it is custom
  - if (!( isValid || var.BeginsWith("cst")) ) AliFatal(Form("Invalid var [%s]", var.Data()));
  + if (!( isValid || var.BeginsWith("cst") || var.BeginsWith("PID.")) ) AliFatal(Form("Invalid var [%s]", var.Data()));
  // If the variable is valid, add it to the list. We have to create a new TObjstring because otherwise it is deleted with the tokens
  if (var == "pt" ) fPt = index;
  else if(var == "phi" ) fPhi = index;
  