diff --git a/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp b/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp
index 2b9a33b7..78c396a0 100644
--- a/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp
+++ b/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp
@@ -58,15 +58,9 @@ ClassImpQ(PMuppCanvas)
 PMuppCanvas::PMuppCanvas()
 {
   fFtokName = TString("");
-  fCheckMsgQueue = 0;
-
-  fStyle = 0;
-  fImp = 0;
-  fBar = 0;
-  fPopupMain = 0;
-
-  fMainCanvas = 0;
-  fMultiGraph = 0;
+  fImp = nullptr;
+  fBar = nullptr;
+  fPopupMain = nullptr;
 
   gStyle->SetHistMinimumZero(kTRUE); // needed to enforce proper bar option handling
 }
@@ -97,11 +91,10 @@ PMuppCanvas::PMuppCanvas(const Char_t *title, Int_t wtopx, Int_t wtopy,
   fValid = true;
 
   fFtokName = TString("");
-  fCheckMsgQueue = 0;
 
   // install IPC message queue timer
-  fCheckMsgQueue = new TTimer();
-  if (fCheckMsgQueue == 0) {
+  fCheckMsgQueue = std::make_unique<TTimer>();
+  if (fCheckMsgQueue == nullptr) {
     fValid = false;
     std::cerr << "**ERROR** couldn't start IPC message queue timer..." << std::endl;
     return;
@@ -113,25 +106,6 @@ PMuppCanvas::PMuppCanvas(const Char_t *title, Int_t wtopx, Int_t wtopy,
   InitMuppCanvas(title, wtopx, wtopy, ww, wh);
 }
 
-//--------------------------------------------------------------------------
-// Destructor
-//--------------------------------------------------------------------------
-/**
- * @brief PMuppCanvas::~PMuppCanvas
- */
-PMuppCanvas::~PMuppCanvas()
-{
-  if (fMainCanvas) {
-    delete fMainCanvas;
-  }
-  if (fMultiGraph) {
-    delete fMultiGraph;
-  }
-  if (fStyle) {
-    delete fStyle;
-  }
-}
-
 //--------------------------------------------------------------------------
 // Done (SIGNAL)
 //--------------------------------------------------------------------------
@@ -217,7 +191,7 @@ void PMuppCanvas::LastCanvasClosed()
  */
 void PMuppCanvas::WindowClosed()
 {
-  gROOT->GetListOfCanvases()->Remove(fMainCanvas);
+  gROOT->GetListOfCanvases()->Remove(fMainCanvas.get());
   LastCanvasClosed();
 }
 
@@ -230,7 +204,7 @@ void PMuppCanvas::WindowClosed()
 void PMuppCanvas::CreateStyle()
 {
   TString muppStyle("muppStyle");
-  fStyle = new TStyle(muppStyle, muppStyle);
+  fStyle = std::make_unique<TStyle>(muppStyle, muppStyle);
   fStyle->SetOptStat(0);  // no statistics options
   fStyle->SetOptTitle(0); // no title
   // set margins
@@ -257,8 +231,8 @@ void PMuppCanvas::InitMuppCanvas(const Char_t *title, Int_t wtopx, Int_t wtopy,
 
   // invoke canvas
   TString canvasName = TString("fMuppCanvas");
-  fMainCanvas = new TCanvas(canvasName.Data(), title, wtopx, wtopy, ww, wh);
-  if (fMainCanvas == 0) {
+  fMainCanvas = std::make_unique<TCanvas>(canvasName.Data(), title, wtopx, wtopy, ww, wh);
+  if (fMainCanvas == nullptr) {
     std::cerr << std::endl << ">> PMuppCanvas::InitMuppCanvas(): **PANIC ERROR** Couldn't invoke " << canvasName.Data();
     std::cerr << std::endl;
     return;
@@ -266,8 +240,6 @@ void PMuppCanvas::InitMuppCanvas(const Char_t *title, Int_t wtopx, Int_t wtopy,
 
   fMainCanvas->SetFillColor(0);
 
-  fMultiGraph = 0;
-
   fImp = (TRootCanvas*)fMainCanvas->GetCanvasImp();
   fImp->Connect("CloseWindow()", "PMuppCanvas", this, "WindowClosed()");
   fBar = fImp->GetMenuBar();
@@ -536,17 +508,14 @@ void PMuppCanvas::UpdateGraphs()
   }
   fGraphE.clear();
 
-  if (fMultiGraph) {
-    delete fMultiGraph;
-    fMultiGraph = 0;
-  }
+  fMultiGraph.reset();
 
   // second: create all the necessary graphs
   TGraphAsymmErrors *gg = 0;
   UInt_t idxS = 0, idxC = 0;
   Int_t color;
   TString str;
-  if (fMultiGraph == 0) { // first time called
+  if (fMultiGraph == nullptr) { // first time called
     for (UInt_t i=0; i<fPlotData.size(); i++) { // loop over all collections
       for (UInt_t j=0; j<fPlotData[i].yValue.size(); j++) { // loop over all graph's within the collection
         gg = new TGraphAsymmErrors(fPlotData[i].xValue.size());
@@ -594,8 +563,8 @@ void PMuppCanvas::UpdateGraphs()
       }
     }
 
-    fMultiGraph = new TMultiGraph();
-    if (fMultiGraph == 0) {
+    fMultiGraph = std::make_unique<TMultiGraph>();
+    if (fMultiGraph == nullptr) {
       std::cerr << "**ERROR** couldn't create necessary TMultiGraph object." << std::endl;
       return;
     }
diff --git a/src/musredit_qt5/mupp/plotter/PMuppCanvas.h b/src/musredit_qt5/mupp/plotter/PMuppCanvas.h
index ba24e97a..79009c1f 100644
--- a/src/musredit_qt5/mupp/plotter/PMuppCanvas.h
+++ b/src/musredit_qt5/mupp/plotter/PMuppCanvas.h
@@ -31,6 +31,7 @@
 #define _PMUPPCANVAS_H_
 
 #include <vector>
+#include <memory>
 
 #include <TObject.h>
 #include <TQObject.h>
@@ -76,7 +77,6 @@ public:
               const PIntVector markerSytleList, const PDoubleVector markerSizeList,
               const PIntVector colorList,
               const int mupp_instance);
-  virtual ~PMuppCanvas();
 
   virtual Bool_t IsValid() { return fValid; }
 
@@ -93,11 +93,11 @@ private:
   Int_t fMuppInstance;
 
   TString fFtokName;
-  TTimer *fCheckMsgQueue; ///< timer needed to check if a message in the IPC message queue is pending
+  std::unique_ptr<TTimer> fCheckMsgQueue; ///< timer needed to check if a message in the IPC message queue is pending
 
   std::vector<PDataCollection> fPlotData;
 
-  TStyle    *fStyle; ///< A collection of all graphics attributes
+  std::unique_ptr<TStyle> fStyle; ///< A collection of all graphics attributes
 
   // canvas menu related variables
   TRootCanvas *fImp;           ///< ROOT native GUI version of main window with menubar and drawing area
@@ -105,8 +105,8 @@ private:
   TGPopupMenu *fPopupMain;     ///< popup menu mupp in the main menu bar
 
   // canvas related variables
-  TCanvas   *fMainCanvas;            ///< main canvas
-  TMultiGraph *fMultiGraph;          ///< main multi graph
+  std::unique_ptr<TCanvas> fMainCanvas;            ///< main canvas
+  std::unique_ptr<TMultiGraph> fMultiGraph; ///< main multi graph
   std::vector<TGraphAsymmErrors*> fGraphE; ///< all error graphs
 
   // perdefined markers, colors
diff --git a/src/musredit_qt5/mupp/plotter/mupp_plot.cpp b/src/musredit_qt5/mupp/plotter/mupp_plot.cpp
index 8b610333..d2db4b85 100644
--- a/src/musredit_qt5/mupp/plotter/mupp_plot.cpp
+++ b/src/musredit_qt5/mupp/plotter/mupp_plot.cpp
@@ -28,6 +28,7 @@
  ***************************************************************************/
 
 #include <iostream>
+#include <memory>
 
 #include <TApplication.h>
 #include <TSAXParser.h>
@@ -55,40 +56,22 @@ int main(int argc, char *argv[])
 
   // read startup file
   char startup_path_name[128];
-  TSAXParser *saxParser = new TSAXParser();
-  PMuppStartupHandler *startupHandler = new PMuppStartupHandler();
+  std::unique_ptr<TSAXParser> saxParser = std::make_unique<TSAXParser>();
+  std::unique_ptr<PMuppStartupHandler> startupHandler = std::make_unique<PMuppStartupHandler>();
   if (!startupHandler->StartupFileFound()) {
     std::cerr << std::endl << ">> mupp_plot **WARNING** couldn't find " << startupHandler->GetStartupFilePath().Data();
     std::cerr << std::endl;
-    // clean up
-    if (saxParser) {
-      delete saxParser;
-      saxParser = 0;
-    }
-    if (startupHandler) {
-      delete startupHandler;
-      startupHandler = 0;
-    }
   } else {
     strcpy(startup_path_name, startupHandler->GetStartupFilePath().Data());
-    saxParser->ConnectToHandler("PMuppStartupHandler", startupHandler);
+    saxParser->ConnectToHandler("PMuppStartupHandler", startupHandler.get());
     // parsing the file as above seems to lead to problems in certain environments;
     // use the parseXmlFile function instead (see PMuppStartupHandler.cpp for the definition)
-    Int_t status = parseXmlFile(saxParser, startup_path_name);
+    Int_t status = parseXmlFile(saxParser.get(), startup_path_name);
     // check for parse errors
     if (status) { // error
       std::cerr << std::endl << ">> mupp_plot **WARNING** Reading/parsing mupp_startup.xml failed.";
       std::cerr << std::endl << ">>                       Graph will appear with random symbols and colors!";
       std::cerr << std::endl;
-      // clean up
-      if (saxParser) {
-        delete saxParser;
-        saxParser = 0;
-      }
-      if (startupHandler) {
-        delete startupHandler;
-        startupHandler = 0;
-      }
     } else {
       startupHandler->CheckLists();
     }
@@ -103,7 +86,7 @@ int main(int argc, char *argv[])
                                             startupHandler->GetColorList(),
                                             mupp_instance);
 
-  if (muppCanvas != 0) {
+  if (muppCanvas != nullptr) {
     if (muppCanvas->IsValid()) {
       // connect signal/slot
       TQObject::Connect("TCanvas", "Closed()", "PMuppCanvas", muppCanvas, "LastCanvasClosed()");
@@ -125,14 +108,6 @@ int main(int argc, char *argv[])
     app.Run(true); // true needed that Run will return after quit so that cleanup works
 
   // clean up
-  if (saxParser) {
-    delete saxParser;
-    saxParser = 0;
-  }
-  if (startupHandler) {
-    delete startupHandler;
-    startupHandler = 0;
-  }
   if (muppCanvas) {
     delete muppCanvas;
     muppCanvas = 0;
diff --git a/src/musredit_qt6/mupp/plotter/PMuppCanvas.cpp b/src/musredit_qt6/mupp/plotter/PMuppCanvas.cpp
index 2b9a33b7..78c396a0 100644
--- a/src/musredit_qt6/mupp/plotter/PMuppCanvas.cpp
+++ b/src/musredit_qt6/mupp/plotter/PMuppCanvas.cpp
@@ -58,15 +58,9 @@ ClassImpQ(PMuppCanvas)
 PMuppCanvas::PMuppCanvas()
 {
   fFtokName = TString("");
-  fCheckMsgQueue = 0;
-
-  fStyle = 0;
-  fImp = 0;
-  fBar = 0;
-  fPopupMain = 0;
-
-  fMainCanvas = 0;
-  fMultiGraph = 0;
+  fImp = nullptr;
+  fBar = nullptr;
+  fPopupMain = nullptr;
 
   gStyle->SetHistMinimumZero(kTRUE); // needed to enforce proper bar option handling
 }
@@ -97,11 +91,10 @@ PMuppCanvas::PMuppCanvas(const Char_t *title, Int_t wtopx, Int_t wtopy,
   fValid = true;
 
   fFtokName = TString("");
-  fCheckMsgQueue = 0;
 
   // install IPC message queue timer
-  fCheckMsgQueue = new TTimer();
-  if (fCheckMsgQueue == 0) {
+  fCheckMsgQueue = std::make_unique<TTimer>();
+  if (fCheckMsgQueue == nullptr) {
     fValid = false;
     std::cerr << "**ERROR** couldn't start IPC message queue timer..." << std::endl;
     return;
@@ -113,25 +106,6 @@ PMuppCanvas::PMuppCanvas(const Char_t *title, Int_t wtopx, Int_t wtopy,
   InitMuppCanvas(title, wtopx, wtopy, ww, wh);
 }
 
-//--------------------------------------------------------------------------
-// Destructor
-//--------------------------------------------------------------------------
-/**
- * @brief PMuppCanvas::~PMuppCanvas
- */
-PMuppCanvas::~PMuppCanvas()
-{
-  if (fMainCanvas) {
-    delete fMainCanvas;
-  }
-  if (fMultiGraph) {
-    delete fMultiGraph;
-  }
-  if (fStyle) {
-    delete fStyle;
-  }
-}
-
 //--------------------------------------------------------------------------
 // Done (SIGNAL)
 //--------------------------------------------------------------------------
@@ -217,7 +191,7 @@ void PMuppCanvas::LastCanvasClosed()
  */
 void PMuppCanvas::WindowClosed()
 {
-  gROOT->GetListOfCanvases()->Remove(fMainCanvas);
+  gROOT->GetListOfCanvases()->Remove(fMainCanvas.get());
   LastCanvasClosed();
 }
 
@@ -230,7 +204,7 @@ void PMuppCanvas::WindowClosed()
 void PMuppCanvas::CreateStyle()
 {
   TString muppStyle("muppStyle");
-  fStyle = new TStyle(muppStyle, muppStyle);
+  fStyle = std::make_unique<TStyle>(muppStyle, muppStyle);
   fStyle->SetOptStat(0);  // no statistics options
   fStyle->SetOptTitle(0); // no title
   // set margins
@@ -257,8 +231,8 @@ void PMuppCanvas::InitMuppCanvas(const Char_t *title, Int_t wtopx, Int_t wtopy,
 
   // invoke canvas
   TString canvasName = TString("fMuppCanvas");
-  fMainCanvas = new TCanvas(canvasName.Data(), title, wtopx, wtopy, ww, wh);
-  if (fMainCanvas == 0) {
+  fMainCanvas = std::make_unique<TCanvas>(canvasName.Data(), title, wtopx, wtopy, ww, wh);
+  if (fMainCanvas == nullptr) {
     std::cerr << std::endl << ">> PMuppCanvas::InitMuppCanvas(): **PANIC ERROR** Couldn't invoke " << canvasName.Data();
     std::cerr << std::endl;
     return;
@@ -266,8 +240,6 @@ void PMuppCanvas::InitMuppCanvas(const Char_t *title, Int_t wtopx, Int_t wtopy,
 
   fMainCanvas->SetFillColor(0);
 
-  fMultiGraph = 0;
-
   fImp = (TRootCanvas*)fMainCanvas->GetCanvasImp();
   fImp->Connect("CloseWindow()", "PMuppCanvas", this, "WindowClosed()");
   fBar = fImp->GetMenuBar();
@@ -536,17 +508,14 @@ void PMuppCanvas::UpdateGraphs()
   }
   fGraphE.clear();
 
-  if (fMultiGraph) {
-    delete fMultiGraph;
-    fMultiGraph = 0;
-  }
+  fMultiGraph.reset();
 
   // second: create all the necessary graphs
   TGraphAsymmErrors *gg = 0;
   UInt_t idxS = 0, idxC = 0;
   Int_t color;
   TString str;
-  if (fMultiGraph == 0) { // first time called
+  if (fMultiGraph == nullptr) { // first time called
     for (UInt_t i=0; i<fPlotData.size(); i++) { // loop over all collections
       for (UInt_t j=0; j<fPlotData[i].yValue.size(); j++) { // loop over all graph's within the collection
         gg = new TGraphAsymmErrors(fPlotData[i].xValue.size());
@@ -594,8 +563,8 @@ void PMuppCanvas::UpdateGraphs()
       }
     }
 
-    fMultiGraph = new TMultiGraph();
-    if (fMultiGraph == 0) {
+    fMultiGraph = std::make_unique<TMultiGraph>();
+    if (fMultiGraph == nullptr) {
       std::cerr << "**ERROR** couldn't create necessary TMultiGraph object." << std::endl;
       return;
     }
diff --git a/src/musredit_qt6/mupp/plotter/PMuppCanvas.h b/src/musredit_qt6/mupp/plotter/PMuppCanvas.h
index ba24e97a..79009c1f 100644
--- a/src/musredit_qt6/mupp/plotter/PMuppCanvas.h
+++ b/src/musredit_qt6/mupp/plotter/PMuppCanvas.h
@@ -31,6 +31,7 @@
 #define _PMUPPCANVAS_H_
 
 #include <vector>
+#include <memory>
 
 #include <TObject.h>
 #include <TQObject.h>
@@ -76,7 +77,6 @@ public:
               const PIntVector markerSytleList, const PDoubleVector markerSizeList,
               const PIntVector colorList,
               const int mupp_instance);
-  virtual ~PMuppCanvas();
 
   virtual Bool_t IsValid() { return fValid; }
 
@@ -93,11 +93,11 @@ private:
   Int_t fMuppInstance;
 
   TString fFtokName;
-  TTimer *fCheckMsgQueue; ///< timer needed to check if a message in the IPC message queue is pending
+  std::unique_ptr<TTimer> fCheckMsgQueue; ///< timer needed to check if a message in the IPC message queue is pending
 
   std::vector<PDataCollection> fPlotData;
 
-  TStyle    *fStyle; ///< A collection of all graphics attributes
+  std::unique_ptr<TStyle> fStyle; ///< A collection of all graphics attributes
 
   // canvas menu related variables
   TRootCanvas *fImp;           ///< ROOT native GUI version of main window with menubar and drawing area
@@ -105,8 +105,8 @@ private:
   TGPopupMenu *fPopupMain;     ///< popup menu mupp in the main menu bar
 
   // canvas related variables
-  TCanvas   *fMainCanvas;            ///< main canvas
-  TMultiGraph *fMultiGraph;          ///< main multi graph
+  std::unique_ptr<TCanvas> fMainCanvas;            ///< main canvas
+  std::unique_ptr<TMultiGraph> fMultiGraph; ///< main multi graph
   std::vector<TGraphAsymmErrors*> fGraphE; ///< all error graphs
 
   // perdefined markers, colors
diff --git a/src/musredit_qt6/mupp/plotter/mupp_plot.cpp b/src/musredit_qt6/mupp/plotter/mupp_plot.cpp
index 8b610333..d2db4b85 100644
--- a/src/musredit_qt6/mupp/plotter/mupp_plot.cpp
+++ b/src/musredit_qt6/mupp/plotter/mupp_plot.cpp
@@ -28,6 +28,7 @@
  ***************************************************************************/
 
 #include <iostream>
+#include <memory>
 
 #include <TApplication.h>
 #include <TSAXParser.h>
@@ -55,40 +56,22 @@ int main(int argc, char *argv[])
 
   // read startup file
   char startup_path_name[128];
-  TSAXParser *saxParser = new TSAXParser();
-  PMuppStartupHandler *startupHandler = new PMuppStartupHandler();
+  std::unique_ptr<TSAXParser> saxParser = std::make_unique<TSAXParser>();
+  std::unique_ptr<PMuppStartupHandler> startupHandler = std::make_unique<PMuppStartupHandler>();
   if (!startupHandler->StartupFileFound()) {
     std::cerr << std::endl << ">> mupp_plot **WARNING** couldn't find " << startupHandler->GetStartupFilePath().Data();
     std::cerr << std::endl;
-    // clean up
-    if (saxParser) {
-      delete saxParser;
-      saxParser = 0;
-    }
-    if (startupHandler) {
-      delete startupHandler;
-      startupHandler = 0;
-    }
   } else {
     strcpy(startup_path_name, startupHandler->GetStartupFilePath().Data());
-    saxParser->ConnectToHandler("PMuppStartupHandler", startupHandler);
+    saxParser->ConnectToHandler("PMuppStartupHandler", startupHandler.get());
     // parsing the file as above seems to lead to problems in certain environments;
     // use the parseXmlFile function instead (see PMuppStartupHandler.cpp for the definition)
-    Int_t status = parseXmlFile(saxParser, startup_path_name);
+    Int_t status = parseXmlFile(saxParser.get(), startup_path_name);
     // check for parse errors
     if (status) { // error
       std::cerr << std::endl << ">> mupp_plot **WARNING** Reading/parsing mupp_startup.xml failed.";
       std::cerr << std::endl << ">>                       Graph will appear with random symbols and colors!";
       std::cerr << std::endl;
-      // clean up
-      if (saxParser) {
-        delete saxParser;
-        saxParser = 0;
-      }
-      if (startupHandler) {
-        delete startupHandler;
-        startupHandler = 0;
-      }
     } else {
       startupHandler->CheckLists();
     }
@@ -103,7 +86,7 @@ int main(int argc, char *argv[])
                                             startupHandler->GetColorList(),
                                             mupp_instance);
 
-  if (muppCanvas != 0) {
+  if (muppCanvas != nullptr) {
     if (muppCanvas->IsValid()) {
       // connect signal/slot
       TQObject::Connect("TCanvas", "Closed()", "PMuppCanvas", muppCanvas, "LastCanvasClosed()");
@@ -125,14 +108,6 @@ int main(int argc, char *argv[])
     app.Run(true); // true needed that Run will return after quit so that cleanup works
 
   // clean up
-  if (saxParser) {
-    delete saxParser;
-    saxParser = 0;
-  }
-  if (startupHandler) {
-    delete startupHandler;
-    startupHandler = 0;
-  }
   if (muppCanvas) {
     delete muppCanvas;
     muppCanvas = 0;