diff --git a/InnerDetector/InDetRecTools/TRT_ElectronPidTools/src/TRT_ElectronPidTool.cxx b/InnerDetector/InDetRecTools/TRT_ElectronPidTools/src/TRT_ElectronPidTool.cxx
index 80f96b4d8e380b9ca7b708365fd4364a907be2ea..9e87c5ad2d0a6061a7b9d80719575887589804f0 100644
--- a/InnerDetector/InDetRecTools/TRT_ElectronPidTools/src/TRT_ElectronPidTool.cxx
+++ b/InnerDetector/InDetRecTools/TRT_ElectronPidTools/src/TRT_ElectronPidTool.cxx
@@ -314,8 +314,8 @@ InDet::TRT_ElectronPidTool::electronProbability(const Trk::Track& track) const
       // correct for data/MC normalisation
       // unfortunately vertex container not yet available here so pileup correction not applied
       ITRT_ToT_dEdx::EGasType gasType;
-      sum_ToT_by_sum_L*= m_TRTdEdxTool->correctNormalization(true,m_DATA, gasType);
-      prob_El_ToT = m_TRTdEdxTool->getTest(gasType, sum_ToT_by_sum_L, pTrk,  Trk::electron,  Trk::pion, nHits);
+      sum_ToT_by_sum_L*= m_TRTdEdxTool->correctNormalization(true,m_DATA);
+      prob_El_ToT = m_TRTdEdxTool->getTest(sum_ToT_by_sum_L, pTrk,  Trk::electron,  Trk::pion, nHits);
     }
     //Calculate the probability based on Brem
     if(m_bremFitterEnabled)
diff --git a/InnerDetector/InDetRecTools/TRT_ElectronPidTools/src/TRT_ElectronPidToolRun2.cxx b/InnerDetector/InDetRecTools/TRT_ElectronPidTools/src/TRT_ElectronPidToolRun2.cxx
index d6189cba65e2a23bd8e0a1ad23a25ef6b8c3d6e6..b7a6d354b95f6d154a249d763dca99e00ca19045 100644
--- a/InnerDetector/InDetRecTools/TRT_ElectronPidTools/src/TRT_ElectronPidToolRun2.cxx
+++ b/InnerDetector/InDetRecTools/TRT_ElectronPidTools/src/TRT_ElectronPidToolRun2.cxx
@@ -404,8 +404,8 @@ InDet::TRT_ElectronPidToolRun2::electronProbability(const Trk::Track& track) con
   // Jared - ToT Implementation
   dEdx = m_TRTdEdxTool->dEdx( &track, true, false, true); // Divide by L, exclude HT hits 
   ITRT_ToT_dEdx::EGasType gasType;
-  double usedHits = m_TRTdEdxTool->usedHits( &track, gasType, true, false);
-  prob_El_ToT = m_TRTdEdxTool->getTest( gasType, dEdx, pTrk, Trk::electron, Trk::pion, usedHits, true ); 
+  double usedHits = m_TRTdEdxTool->usedHits( &track, true, false);
+  prob_El_ToT = m_TRTdEdxTool->getTest( dEdx, pTrk, Trk::electron, Trk::pion, usedHits, true ); 
   
   // Limit the probability values the upper and lower limits that are given/trusted for each part:
   double limProbHT = HTcalc.Limit(prob_El_HT); 
diff --git a/InnerDetector/InDetRecTools/TRT_ToT_Tools/TRT_ToT_Tools/ITRT_ToT_dEdx.h b/InnerDetector/InDetRecTools/TRT_ToT_Tools/TRT_ToT_Tools/ITRT_ToT_dEdx.h
index 4265a8e7676c0ecc9b49b0cb53160331fb1d5a2c..788304dc0e06a34e9c096f383d0ec3b45b05f302 100644
--- a/InnerDetector/InDetRecTools/TRT_ToT_Tools/TRT_ToT_Tools/ITRT_ToT_dEdx.h
+++ b/InnerDetector/InDetRecTools/TRT_ToT_Tools/TRT_ToT_Tools/ITRT_ToT_dEdx.h
@@ -51,8 +51,8 @@ public:
    * @param bool variable whether HT hits shoule be used
    * @return nHits
    */
-  virtual double usedHits(const Trk::Track* track, EGasType& gasType, bool DivideByL, bool useHThits) const = 0;
-  virtual double usedHits(const Trk::Track* track, EGasType& gasType) const = 0;
+  virtual double usedHits(const Trk::Track* track, bool DivideByL, bool useHThits) const = 0;
+  virtual double usedHits(const Trk::Track* track) const = 0;
 
   /** 
    * @brief function to define what is a good hit to be used for dEdx calculation
@@ -70,7 +70,7 @@ public:
    * @param number of primary vertices per event
    * @return scaling variable
    */
-  virtual double correctNormalization(bool divideLength, bool scaledata, EGasType& gasType, double nVtx=-1) const = 0;
+  virtual double correctNormalization(bool divideLength, bool scaledata, double nVtx=-1) const = 0;
 
   /**
    * @brief function to calculate likelihood from prediction and resolution
@@ -92,8 +92,8 @@ public:
    * @param number of used hits
    * @return test value between 0 and 1
    */
-  virtual double getTest(EGasType gasType, const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits, bool dividebyL) const = 0;
-  virtual double getTest(EGasType gasType, const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits) const = 0;
+  virtual double getTest(const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits, bool dividebyL) const = 0;
+  virtual double getTest(const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits) const = 0;
 
 
   /**
diff --git a/InnerDetector/InDetRecTools/TRT_ToT_Tools/TRT_ToT_Tools/TRT_ToT_dEdx.h b/InnerDetector/InDetRecTools/TRT_ToT_Tools/TRT_ToT_Tools/TRT_ToT_dEdx.h
index e4cffacbd2b6cf0b72c5b71dcbc815688ad16401..74a4f1b93fffdc7ed59a2091419b23250ecc187a 100644
--- a/InnerDetector/InDetRecTools/TRT_ToT_Tools/TRT_ToT_Tools/TRT_ToT_dEdx.h
+++ b/InnerDetector/InDetRecTools/TRT_ToT_Tools/TRT_ToT_Tools/TRT_ToT_dEdx.h
@@ -125,14 +125,14 @@ public:
    * @param bool variable whether HT hits shoule be used
    * @return nHits
    */
-  double usedHits(const Trk::Track* track, EGasType& gasType, bool DivideByL, bool useHThits) const;
+  double usedHits(const Trk::Track* track, bool DivideByL, bool useHThits) const;
 
   /**
    * @brief function to calculate number of used hits
    * @param track pointer
    * @return nHits
    */
-  double usedHits(const Trk::Track* track, EGasType& gasType) const;
+  double usedHits(const Trk::Track* track) const;
 
   /** 
    * @brief function to define what is a good hit to be used for dEdx calculation
@@ -151,7 +151,7 @@ public:
    * @param number of primary vertices per event
    * @return scaling variable
    */
-  double correctNormalization(bool divideLength, bool scaledata, EGasType& gasType, double nVtx=-1) const;
+  double correctNormalization(bool divideLength, bool scaledata, double nVtx=-1) const;
 
   /**
    * @brief function to calculate likelihood from prediction and resolution
@@ -174,8 +174,8 @@ public:
    * @param number of used hits
    * @return test value between 0 and 1
    */
-  double getTest(EGasType gasType, const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits) const;
-  double getTest(EGasType gasType, const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits, bool dividebyL) const;
+  double getTest(const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits) const;
+  double getTest(const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits, bool dividebyL) const;
 
   /**
    * @brief function to calculate expectation value for dEdx using BB fit
diff --git a/InnerDetector/InDetRecTools/TRT_ToT_Tools/src/TRT_ToT_dEdx.cxx b/InnerDetector/InDetRecTools/TRT_ToT_Tools/src/TRT_ToT_dEdx.cxx
index 4f3f021dde49a05ea209f9a46b01820ab74a3bd6..e5a040ed74b593a2fadde19f5c049bb9475a292b 100644
--- a/InnerDetector/InDetRecTools/TRT_ToT_Tools/src/TRT_ToT_dEdx.cxx
+++ b/InnerDetector/InDetRecTools/TRT_ToT_Tools/src/TRT_ToT_dEdx.cxx
@@ -161,6 +161,7 @@ StatusCode TRT_ToT_dEdx::initialize()
     return StatusCode::FAILURE;
   }
       
+  //  ShowDEDXSetup();  
 
   ATH_MSG_INFO("//////////////////////////////////////////////////////////////////");
   ATH_MSG_INFO("///              TRT_ToT_Tool setup configuration              ///");
@@ -772,7 +773,6 @@ bool TRT_ToT_dEdx::isData() const {
 double TRT_ToT_dEdx::dEdx(const Trk::Track* track, bool divideByL, bool useHThits, bool corrected) const
 {
   ATH_MSG_DEBUG("dEdx()");
-  ShowDEDXSetup();  
 
   double nVtx=-1.;
 
@@ -825,7 +825,7 @@ double TRT_ToT_dEdx::dEdx(const Trk::Track* track, bool divideByL, bool useHThit
       for (int i = 0; i < nhits;i++){
         ToTsum+=vecToT.at(i);
       } 
-      ToTsum*=correctNormalization(divideByL, m_isData, gasType, nVtx);
+      ToTsum*=correctNormalization(divideByL, m_isData, nVtx);
 
       return ToTsum/nhits;
     }
@@ -921,7 +921,7 @@ double TRT_ToT_dEdx::dEdx(const Trk::Track* track, bool divideByL, bool useHThit
 
         double ToTsum = ToTsumXe*nhitsXe + ToTsumAr*nhitsAr + ToTsumKr*nhitsKr;
 
-        ToTsum*=correctNormalization(divideByL, m_isData, gasType, nVtx);
+        ToTsum*=correctNormalization(divideByL, m_isData, nVtx);
 
         return ToTsum/nhits;
       }
@@ -931,16 +931,15 @@ double TRT_ToT_dEdx::dEdx(const Trk::Track* track, bool divideByL, bool useHThit
   return 0.;
 }
 
-double TRT_ToT_dEdx::usedHits(const Trk::Track* track, EGasType& gasType) const
+double TRT_ToT_dEdx::usedHits(const Trk::Track* track) const
 {
-  return usedHits(track, gasType, m_divideByL, m_useHThits);
+  return usedHits(track, m_divideByL, m_useHThits);
 }
 
-double TRT_ToT_dEdx::usedHits(const Trk::Track* track, EGasType& gasType, bool divideByL, bool useHThits) const
+double TRT_ToT_dEdx::usedHits(const Trk::Track* track, bool divideByL, bool useHThits) const
 {
   ATH_MSG_DEBUG("usedHits()");
-  ShowDEDXSetup();  
-  gasType = kUnset;
+  EGasType gasType = kUnset;
 
   if (!track) {
     return 0;
@@ -1074,15 +1073,17 @@ double TRT_ToT_dEdx::getProb(EGasType gasType, const double dEdx_obs, const doub
 }
 
 
-double TRT_ToT_dEdx::getTest(EGasType gasType, const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits) const {
+double TRT_ToT_dEdx::getTest(const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits) const {
 
-  return getTest(gasType, dEdx_obs, pTrk, hypothesis, antihypothesis, nUsedHits, m_divideByL);
+  return getTest(dEdx_obs, pTrk, hypothesis, antihypothesis, nUsedHits, m_divideByL);
 
 }
 
-double TRT_ToT_dEdx::getTest(EGasType gasType, const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits, bool divideByL) const
+double TRT_ToT_dEdx::getTest(const double dEdx_obs, const double pTrk, Trk::ParticleHypothesis hypothesis, Trk::ParticleHypothesis antihypothesis, int nUsedHits, bool divideByL) const
 {
   ATH_MSG_DEBUG("getTest()");
+
+  EGasType gasType = kUnset;
         
   if ( dEdx_obs<=0. || pTrk<=0. || nUsedHits<=0 ) return 0.5;
   
@@ -1237,9 +1238,9 @@ double TRT_ToT_dEdx::getToT(unsigned int BitPattern) const
 // Corrections
 /////////////////////////////////
 
-double TRT_ToT_dEdx::correctNormalization(bool divideLength,bool scaledata, EGasType& gasType, double nVtx) const
+double TRT_ToT_dEdx::correctNormalization(bool divideLength,bool scaledata, double nVtx) const
 {
-  gasType = static_cast<EGasType> (m_useTrackPartWithGasType);
+  EGasType gasType = static_cast<EGasType> (m_useTrackPartWithGasType);
   if(m_useTrackPartWithGasType==kUnset)
     gasType=kXenon;
   if(nVtx<=0)nVtx=Dedxcorrection::norm_nzero[gasType];
diff --git a/PhysicsAnalysis/DerivationFramework/DerivationFrameworkInDet/src/TrackStateOnSurfaceDecorator.cxx b/PhysicsAnalysis/DerivationFramework/DerivationFrameworkInDet/src/TrackStateOnSurfaceDecorator.cxx
index cb16dc26721bc6c1f6cf80fff6710a2db804e93a..929d48ab50d7f95388406d6ad8746371183d1edb 100644
--- a/PhysicsAnalysis/DerivationFramework/DerivationFrameworkInDet/src/TrackStateOnSurfaceDecorator.cxx
+++ b/PhysicsAnalysis/DerivationFramework/DerivationFrameworkInDet/src/TrackStateOnSurfaceDecorator.cxx
@@ -299,9 +299,9 @@ namespace DerivationFramework {
 
 	decoratorTRTdEdx (*track)     = m_TRTdEdxTool->dEdx( trkTrack, true, true, true);
         ITRT_ToT_dEdx::EGasType gasType;
-	decoratorTRTusedHits (*track) = m_TRTdEdxTool->usedHits( trkTrack, gasType, true, true);
+	decoratorTRTusedHits (*track) = m_TRTdEdxTool->usedHits( trkTrack, true, true);
 	decoratorTRTdEdx_noHT_divByL (*track)     = m_TRTdEdxTool->dEdx( trkTrack, true, false, true);
-	decoratorTRTusedHits_noHT_divByL (*track) = m_TRTdEdxTool->usedHits( trkTrack, gasType, true, false);
+	decoratorTRTusedHits_noHT_divByL (*track) = m_TRTdEdxTool->usedHits( trkTrack, true, false);
       }
 
       // -- Add Track states to the current track, filtering on their type
diff --git a/Tracking/TrkTools/TrkTrackSummaryTool/src/TrackSummaryTool.cxx b/Tracking/TrkTools/TrkTrackSummaryTool/src/TrackSummaryTool.cxx
index 70879faa2ace09faa7326350079ac573d1704822..4bb93624861f27e454aafc20679c31291e6e7541 100755
--- a/Tracking/TrkTools/TrkTrackSummaryTool/src/TrackSummaryTool.cxx
+++ b/Tracking/TrkTools/TrkTrackSummaryTool/src/TrackSummaryTool.cxx
@@ -302,7 +302,7 @@ Trk::TrackSummaryTool::createSummary( const Track& track,
   if (!m_trt_dEdxTool.empty()) {
     if (information[Trk::numberOfTRTHits]+information[Trk::numberOfTRTOutliers]>=m_minTRThitsForTRTdEdx) {
       ITRT_ToT_dEdx::EGasType gasType;
-      int nhits = static_cast<int>( m_trt_dEdxTool->usedHits(&track, gasType, m_TRTdEdx_DivideByL, m_TRTdEdx_useHThits) );
+      int nhits = static_cast<int>( m_trt_dEdxTool->usedHits(&track, m_TRTdEdx_DivideByL, m_TRTdEdx_useHThits) );
       double fvalue = (nhits>0 ? m_trt_dEdxTool->dEdx(&track, m_TRTdEdx_DivideByL, m_TRTdEdx_useHThits, m_TRTdEdx_corrected) : 0.0);
       eProbability.push_back(fvalue);
       information[ numberOfTRTHitsUsedFordEdx] = static_cast<uint8_t>(std::max(nhits,0));
@@ -384,7 +384,7 @@ void Trk::TrackSummaryTool::updateAdditionalInfo(Track& track) const
   if (!m_trt_dEdxTool.empty()) {
     if (tSummary->get(Trk::numberOfTRTHits)+tSummary->get(Trk::numberOfTRTOutliers)>=m_minTRThitsForTRTdEdx) {
       ITRT_ToT_dEdx::EGasType gasType;
-      int nhits = static_cast<int>( m_trt_dEdxTool->usedHits(&track, gasType, m_TRTdEdx_DivideByL, m_TRTdEdx_useHThits) );
+      int nhits = static_cast<int>( m_trt_dEdxTool->usedHits(&track, m_TRTdEdx_DivideByL, m_TRTdEdx_useHThits) );
       double fvalue = (nhits>0 ? m_trt_dEdxTool->dEdx(&track, m_TRTdEdx_DivideByL, m_TRTdEdx_useHThits, m_TRTdEdx_corrected) : 0.0);
       eProbability.push_back(fvalue);
       if (!tSummary->update(Trk::numberOfTRTHitsUsedFordEdx, static_cast<uint8_t>(std::max(nhits,0)) )) {