From 348153cf72968ad94534a3ac58dc60fff701df0b Mon Sep 17 00:00:00 2001
From: Roman Lavicka <roman.lavicka@cern.ch>
Date: Sat, 13 Jul 2024 21:13:00 +0200
Subject: [PATCH] fix to avoid calling undefined histograms

---
 PWGUD/Tasks/upcTauCentralBarrelRL.cxx | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/PWGUD/Tasks/upcTauCentralBarrelRL.cxx b/PWGUD/Tasks/upcTauCentralBarrelRL.cxx
index dd7dca1e9a5..965bfb6f327 100644
--- a/PWGUD/Tasks/upcTauCentralBarrelRL.cxx
+++ b/PWGUD/Tasks/upcTauCentralBarrelRL.cxx
@@ -2206,7 +2206,7 @@ struct UpcTauCentralBarrelRL {
             histos.get<TH2>(HIST("EventTwoTracks/TwoElectrons/PID/hTOFnSigmaVsP"))->Fill(daug[0].P(), trkDaug1.tofNSigmaEl());
           }
         }
-        if (countPVGTmuonsSelection == 2) {
+        if (countPVGTmuonsSelection == 2 && doMuonStudy) {
           histos.get<TH2>(HIST("EventTwoTracks/MuonsSelection/PID/hTPCsignalVsP"))->Fill(daug[0].P(), trkDaug1.tpcSignal());
           histos.get<TH2>(HIST("EventTwoTracks/MuonsSelection/PID/hTPCnSigmaVsP"))->Fill(daug[0].P(), trkDaug1.tpcNSigmaEl());
           if (trkDaug1.hasTOF()) {
@@ -2254,7 +2254,7 @@ struct UpcTauCentralBarrelRL {
             histos.get<TH2>(HIST("EventTwoTracks/TwoElectrons/PID/hTOFnSigmaVsP"))->Fill(daug[1].P(), trkDaug2.tofNSigmaEl());
           }
         }
-        if (countPVGTmuonsSelection == 2) {
+        if (countPVGTmuonsSelection == 2 && doMuonStudy) {
           histos.get<TH2>(HIST("EventTwoTracks/MuonsSelection/PID/hTPCsignalVsP"))->Fill(daug[1].P(), trkDaug2.tpcSignal());
           histos.get<TH2>(HIST("EventTwoTracks/MuonsSelection/PID/hTPCnSigmaVsP"))->Fill(daug[1].P(), trkDaug2.tpcNSigmaEl());
           if (trkDaug1.hasTOF()) {
@@ -2319,7 +2319,7 @@ struct UpcTauCentralBarrelRL {
             }
           }
         }
-        if (countPVGTmuonsSelection == 2) {
+        if (countPVGTmuonsSelection == 2 && doMuonStudy) {
           if (daug[0].P() > daug[1].P()) {
             histos.get<TH2>(HIST("EventTwoTracks/MuonsSelection/PID/hTPCsignalVsLP"))->Fill(daug[0].P(), trkDaug1.tpcSignal());
             histos.get<TH2>(HIST("EventTwoTracks/MuonsSelection/PID/hTPCsignalVsOP"))->Fill(daug[1].P(), trkDaug2.tpcSignal());