diff --git a/MuonSpectrometer/MuonReconstruction/MuonRecTools/MuonTruthTools/src/MuonTruthSummaryTool.cxx b/MuonSpectrometer/MuonReconstruction/MuonRecTools/MuonTruthTools/src/MuonTruthSummaryTool.cxx
index 76bad77ea86ff7d90a52d0493090eb535c0cd9f6..99cc4192131240eb8c59359ea581c8ff78ad969e 100644
--- a/MuonSpectrometer/MuonReconstruction/MuonRecTools/MuonTruthTools/src/MuonTruthSummaryTool.cxx
+++ b/MuonSpectrometer/MuonReconstruction/MuonRecTools/MuonTruthTools/src/MuonTruthSummaryTool.cxx
@@ -123,6 +123,7 @@ namespace Muon {
   void MuonTruthSummaryTool::getTruth() const {
 
     for(SG::ReadHandle<PRD_MultiTruthCollection>& col : m_TruthNames.makeHandles()){
+      if(!col.isValid() || !col.isPresent()) continue;
       ATH_MSG_DEBUG(  "PRD_MultiTruthCollection " << col.key() << " found");
       PRD_MultiTruthCollection::const_iterator it = col->begin();
       PRD_MultiTruthCollection::const_iterator it_end = col->end();
diff --git a/MuonSpectrometer/MuonValidation/MuonRecValidation/MuonTrackPerformance/src/MuonRecoValidationTool.cxx b/MuonSpectrometer/MuonValidation/MuonRecValidation/MuonTrackPerformance/src/MuonRecoValidationTool.cxx
index e07f109542040eaf44a04446746520e6ff51dbaa..bf65ff876729321a3528bb8618839b66468c5da8 100644
--- a/MuonSpectrometer/MuonValidation/MuonRecValidation/MuonTrackPerformance/src/MuonRecoValidationTool.cxx
+++ b/MuonSpectrometer/MuonValidation/MuonRecValidation/MuonTrackPerformance/src/MuonRecoValidationTool.cxx
@@ -63,7 +63,8 @@ namespace Muon {
     declareProperty("Extrapolator",m_extrapolator );    
     declareProperty("MatchTool",m_matchingTool );    
     declareProperty("MuonHitTimingTool",m_hitTimingTool );    
-    declareProperty("IncidentSvc",m_incidentSvc );    
+    declareProperty("IncidentSvc",m_incidentSvc );
+    declareProperty("isMC",m_isMC=false);
   }
     
   MuonRecoValidationTool::~MuonRecoValidationTool() {
@@ -76,7 +77,12 @@ namespace Muon {
     ATH_CHECK(m_edmHelper.retrieve());
     ATH_CHECK(m_segmentHitSummaryTool.retrieve());
     ATH_CHECK(m_hitSummaryTool.retrieve());
-    ATH_CHECK(m_truthSummaryTool.retrieve());
+    if(m_isMC){
+      ATH_CHECK(m_truthSummaryTool.retrieve());
+    }
+    else{
+      m_truthSummaryTool.disable();
+    }
     ATH_CHECK(m_extrapolator.retrieve());
     ATH_CHECK(m_matchingTool.retrieve());
     ATH_CHECK(m_hitTimingTool.retrieve());
@@ -164,6 +170,8 @@ namespace Muon {
   
   int MuonRecoValidationTool::getBarcode( const std::set<Identifier>& ids ) const {
 
+    if(!m_isMC) return -1;
+
     // count how often a barcode occurs 
     std::map<int,int> counters;
     for( std::set<Identifier>::const_iterator it=ids.begin();it!=ids.end();++it ){
@@ -211,8 +219,11 @@ namespace Muon {
                               stauHit.propagationTime, stauHit.e, tof, 0., stauHit.shift, 1000 * m_candidateCounter);
       
       // barcode + pdg
-      int barcode = m_truthSummaryTool->getBarcode(id);
-      int pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+      int barcode=-1,pdg=0;
+      if(m_isMC){
+	barcode = m_truthSummaryTool->getBarcode(id);
+	pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+      }
       m_ntuple.timeBlock.truth.fill(pdg,barcode);
     }    
     ++m_candidateCounter;
@@ -232,8 +243,11 @@ namespace Muon {
     m_ntuple.timeBlock.fill(2,m_idHelper->gasGapId(id).get_identifier32().get_compact(),gpos.perp(),gpos.z(),time,errorTime);
 
     // barcode + pdg
-    int barcode = m_truthSummaryTool->getBarcode(id);
-    int pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+    int barcode=-1,pdg=0;
+    if(m_isMC){
+      barcode = m_truthSummaryTool->getBarcode(id);
+      pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+    }
     m_ntuple.timeBlock.truth.fill(pdg,barcode);
     
     return true;
@@ -261,7 +275,8 @@ namespace Muon {
       std::vector<const MuonClusterOnTrack*> clusters;
       extract(*seg,ids,clusters);
       int barcode = getBarcode(ids);
-      int pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+      int pdg=0;
+      if(m_isMC) pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
       m_ntuple.timeBlock.truth.fill(pdg,barcode);
       
       return true;
@@ -277,8 +292,11 @@ namespace Muon {
 
 
       // barcode + pdg
-      int barcode = m_truthSummaryTool->getBarcode(id);
-      int pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+      int barcode=-1,pdg=0;
+      if(m_isMC){
+	barcode = m_truthSummaryTool->getBarcode(id);
+	pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+      }
       m_ntuple.timeBlock.truth.fill(pdg,barcode);
       
       bool measphi = m_idHelper->measuresPhi(id);
@@ -352,7 +370,8 @@ namespace Muon {
 
     // barcode + pdg
     int barcode = getBarcode(ids);
-    int pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+    int pdg=0;
+    if(m_isMC) pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
     m_ntuple.segmentBlock.truth.fill(pdg,barcode);
 
     m_ntuple.segmentBlock.track.fill(getIndex(intersection));
@@ -425,8 +444,11 @@ namespace Muon {
         ids.insert((*hit)->prd->identify());
       }
     }
-    int barcode = getBarcode(ids);
-    int pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+    int barcode=-1,pdg=0;
+    if(m_isMC){
+      barcode = getBarcode(ids);
+      pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+    }
     m_ntuple.houghBlock.truth.fill(pdg,barcode);
 
     ATH_MSG_DEBUG(" Adding Hough maximum to ntuple ");
@@ -441,8 +463,11 @@ namespace Muon {
     m_ntuple.hitBlock.id.fill(m_idHelper->sector(id),m_idHelper->chamberIndex(id));
     m_ntuple.hitBlock.track.fill(getIndex(intersection));
     
-    int barcode = m_truthSummaryTool->getBarcode(id);
-    int pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+    int barcode=-1,pdg=0;
+    if(m_isMC){
+      barcode = m_truthSummaryTool->getBarcode(id);
+      pdg = barcode != -1 ? m_truthSummaryTool->getPdgId(barcode) : 0;
+    }
     m_ntuple.hitBlock.truth.fill(pdg,barcode);
 
     float sign = expos < 0 ? -1. : 1.;
diff --git a/MuonSpectrometer/MuonValidation/MuonRecValidation/MuonTrackPerformance/src/MuonRecoValidationTool.h b/MuonSpectrometer/MuonValidation/MuonRecValidation/MuonTrackPerformance/src/MuonRecoValidationTool.h
index 54eb3dcd28e82443a7c91233ce91a6bda87a3bc0..ad783a294987e0462f65e7ce4cee3b2f1deb067e 100644
--- a/MuonSpectrometer/MuonValidation/MuonRecValidation/MuonTrackPerformance/src/MuonRecoValidationTool.h
+++ b/MuonSpectrometer/MuonValidation/MuonRecValidation/MuonTrackPerformance/src/MuonRecoValidationTool.h
@@ -119,6 +119,8 @@ namespace Muon {
     TTree* m_tree;
 
     unsigned int m_candidateCounter;
+
+    bool m_isMC;
   };
   
 }
diff --git a/Reconstruction/MuonIdentification/MuonCombinedRecExample/python/MuGirlTagTool.py b/Reconstruction/MuonIdentification/MuonCombinedRecExample/python/MuGirlTagTool.py
index 62e0b6fb2705371e08359f351296fd272729fb0c..8cf4920ee27ea5b22ac9304e8013c0581c26a606 100644
--- a/Reconstruction/MuonIdentification/MuonCombinedRecExample/python/MuGirlTagTool.py
+++ b/Reconstruction/MuonIdentification/MuonCombinedRecExample/python/MuGirlTagTool.py
@@ -4,6 +4,7 @@
 
 from AthenaCommon import CfgMgr
 from AthenaCommon.CfgGetter import getPublicTool,getService
+from AthenaCommon.GlobalFlags import globalflags
 
 from RecExConfig.RecFlags import rec
 
@@ -48,6 +49,8 @@ def MuonLayerAmbiguitySolverTool( name="MuonLayerAmbiguitySolverTool",**kwargs):
    return CfgMgr.Muon__MuonLayerAmbiguitySolverTool(name,**kwargs)
 
 def MuonRecoValidationTool( name="MuonRecoValidationTool",**kwargs):
+   if globalflags.DataSource() != 'data':
+      kwargs.setdefault("isMC",True)
    return CfgMgr.Muon__MuonRecoValidationTool(name,**kwargs)
 
 def DCMathStauSegmentMaker( name="DCMathStauSegmentMaker", **kwargs ):