Flag for non-existance of SPD vertex

diff --git a/PWGUD/UPC/AliAnalysisTaskUpcPsi2s.cxx b/PWGUD/UPC/AliAnalysisTaskUpcPsi2s.cxx
index a5dfa80db04a4123dcfd78f210ee6b661b0d6b12..d85a634d266bb879a702361a0d34f36fdc1f00b9 100644 (file)
--- a/PWGUD/UPC/AliAnalysisTaskUpcPsi2s.cxx
+++ b/PWGUD/UPC/AliAnalysisTaskUpcPsi2s.cxx
@@ -845,6 +845,11 @@ void AliAnalysisTaskUpcPsi2s::RunAODtree()
        fSpdVtxPos[1] = fSPDVertex->GetY();
        fSpdVtxPos[2] = fSPDVertex->GetZ();
        }
+  else{
+       fSpdVtxPos[0] = -666;
+       fSpdVtxPos[1] = -666;
+       fSpdVtxPos[2] = -666;
+       }
 
   //Tracklets
   fNtracklets = aod->GetTracklets()->GetNumberOfTracklets();