diff --git a/extensions/apps/traceAnalyzer/businessObjects/pythoncaller.cpp b/extensions/apps/traceAnalyzer/businessObjects/pythoncaller.cpp
index fa21e2c8..29941fd3 100644
--- a/extensions/apps/traceAnalyzer/businessObjects/pythoncaller.cpp
+++ b/extensions/apps/traceAnalyzer/businessObjects/pythoncaller.cpp
@@ -45,12 +45,6 @@
 #include <QDebug>
 #include <QApplication>
 
-PythonCaller &PythonCaller::instance()
-{
-    static PythonCaller instance;
-    return instance;
-}
-
 PythonCaller::PythonCaller() :
     metricModuleName("metrics"),
     metricFunctionName("calculateMetrics"),
diff --git a/extensions/apps/traceAnalyzer/businessObjects/pythoncaller.h b/extensions/apps/traceAnalyzer/businessObjects/pythoncaller.h
index 3b6a84d8..30bd8d8a 100644
--- a/extensions/apps/traceAnalyzer/businessObjects/pythoncaller.h
+++ b/extensions/apps/traceAnalyzer/businessObjects/pythoncaller.h
@@ -54,7 +54,8 @@
 class PythonCaller
 {
 public:
-    static PythonCaller &instance();
+    PythonCaller();
+    ~PythonCaller();
 
     TraceCalculatedMetrics calculateMetricsOnTrace(QString pathToTrace,
                                                    std::vector<long> list);
@@ -65,11 +66,6 @@ public:
     QString exportAsVcd(QString pathToTrace);
 
 private:
-    PythonCaller();
-    ~PythonCaller();
-    PythonCaller(const PythonCaller &other) = delete;
-    PythonCaller &operator=(const PythonCaller &other) = delete;
-
     PyObject *pCalculateMetricsFunction, *pGetMetricsFunction;
     PyObject *pGenPlotsFunction;
     PyObject *pVcdExportFunction = nullptr;
diff --git a/extensions/apps/traceAnalyzer/evaluationtool.cpp b/extensions/apps/traceAnalyzer/evaluationtool.cpp
index 0bfd9693..078ea775 100644
--- a/extensions/apps/traceAnalyzer/evaluationtool.cpp
+++ b/extensions/apps/traceAnalyzer/evaluationtool.cpp
@@ -53,9 +53,9 @@
 
 using namespace  std;
 
-EvaluationTool::EvaluationTool(QWidget *parent) :
+EvaluationTool::EvaluationTool(PythonCaller &pythonCaller, QWidget *parent) :
     QWidget(parent),
-    ui(new Ui::EvaluationTool), resourcesRelPath("/../../dram/resources/scripts""")
+    ui(new Ui::EvaluationTool), resourcesRelPath("/../../dram/resources/scripts"""), pythonCaller(pythonCaller)
 {
     ui->setupUi(this);
     traceFilesModel = new QStandardItemModel(this);
@@ -93,7 +93,7 @@ vector<string> EvaluationTool::getMetrics()
     vector<string> metrics;
     for (int row = 0; row < traceFilesModel->rowCount(); ++row) {
         TraceFileItem *item = static_cast<TraceFileItem *>(traceFilesModel->item(row));
-        vector<string> result = PythonCaller::instance().getMetrics(item->getPath());
+        vector<string> result = pythonCaller.getMetrics(item->getPath());
         if (result.size() > metrics.size())
             metrics = result;
     }
@@ -141,7 +141,7 @@ void EvaluationTool::calculateMetrics(vector<long> selectedMetrics)
         TraceFileItem *item = static_cast<TraceFileItem *>(traceFilesModel->item(row));
         if (item->checkState() == Qt::Checked)
         {
-            TraceCalculatedMetrics result = PythonCaller::instance().calculateMetricsOnTrace(
+            TraceCalculatedMetrics result = pythonCaller.calculateMetricsOnTrace(
                                                 item->getPath(), selectedMetrics);
             calculatedMetrics.push_back(result);
             ui->traceMetricTreeWidget->addTraceMetricResults(result);
@@ -196,7 +196,7 @@ void EvaluationTool::genPlots()
         {
             ui->traceMetricTreeWidget->addTracePlotResults(QFileInfo(
                                                            item->getPath()).baseName(),
-                                                       PythonCaller::instance().generatePlotsOnTrace(item->getPath()));
+                                                       pythonCaller.generatePlotsOnTrace(item->getPath()));
         }
     }
     ui->traceMetricTreeWidget->expandAll();
diff --git a/extensions/apps/traceAnalyzer/evaluationtool.h b/extensions/apps/traceAnalyzer/evaluationtool.h
index 45dc3a89..6c32d487 100644
--- a/extensions/apps/traceAnalyzer/evaluationtool.h
+++ b/extensions/apps/traceAnalyzer/evaluationtool.h
@@ -61,7 +61,7 @@ class EvaluationTool : public QWidget
     Q_OBJECT
 
 public:
-    explicit EvaluationTool(QWidget *parent = 0);
+    explicit EvaluationTool(PythonCaller &pythonCaller, QWidget *parent = nullptr);
     ~EvaluationTool();
 
     void showForFiles(QList<QString> paths);
@@ -87,6 +87,8 @@ private:
     QString resourcesRelPath;
     SelectMetrics *selectMetrics;
 
+    PythonCaller &pythonCaller;
+
     class TraceFileItem : public QStandardItem
     {
     public:
diff --git a/extensions/apps/traceAnalyzer/traceanalyzer.cpp b/extensions/apps/traceAnalyzer/traceanalyzer.cpp
index 3dbb2000..499ea212 100644
--- a/extensions/apps/traceAnalyzer/traceanalyzer.cpp
+++ b/extensions/apps/traceAnalyzer/traceanalyzer.cpp
@@ -63,7 +63,8 @@ void TraceAnalyzer::setUpGui()
 
 TraceAnalyzer::TraceAnalyzer(QWidget *parent) :
     QMainWindow(parent),
-    ui(new Ui::TraceAnalyzer)
+    ui(new Ui::TraceAnalyzer),
+    evaluationTool(pythonCaller)
 {
     setUpGui();
 }
@@ -71,7 +72,8 @@ TraceAnalyzer::TraceAnalyzer(QWidget *parent) :
 TraceAnalyzer::TraceAnalyzer(QSet<QString> paths, StartupOption option,
                              QWidget *parent):
     QMainWindow(parent),
-    ui(new Ui::TraceAnalyzer)
+    ui(new Ui::TraceAnalyzer),
+    evaluationTool(pythonCaller)
 {
     setUpGui();
 
@@ -99,7 +101,7 @@ void TraceAnalyzer::on_actionOpen_triggered()
 
 TraceFileTab *TraceAnalyzer::createTraceFileTab(const QString &path)
 {
-    TraceFileTab *traceFileTab = new TraceFileTab(this, path);
+    TraceFileTab *traceFileTab = new TraceFileTab(path.toStdString(), pythonCaller, this);
 
     connect(traceFileTab, &TraceFileTab::statusChanged, this, &TraceAnalyzer::statusChanged);
 
@@ -125,7 +127,7 @@ void TraceAnalyzer::on_menuFile_aboutToShow()
     ui->actionQuit->setEnabled(true);
 
     bool tabsOpen = ui->traceFileTabs->count() > 0;
-    bool exportAsVcdAvailable = PythonCaller::instance().vcdExportDependenciesAvailable();
+    bool exportAsVcdAvailable = pythonCaller.vcdExportDependenciesAvailable();
 
     ui->actionSave->setEnabled(tabsOpen);
     ui->actionSave_all->setEnabled(tabsOpen);
diff --git a/extensions/apps/traceAnalyzer/traceanalyzer.h b/extensions/apps/traceAnalyzer/traceanalyzer.h
index 8320fe07..2e943f5d 100644
--- a/extensions/apps/traceAnalyzer/traceanalyzer.h
+++ b/extensions/apps/traceAnalyzer/traceanalyzer.h
@@ -60,12 +60,10 @@ class TraceAnalyzer : public QMainWindow
     Q_OBJECT
 
 public:
-    explicit TraceAnalyzer(QWidget *parent = 0);
+    explicit TraceAnalyzer(QWidget *parent = nullptr);
     explicit TraceAnalyzer(QSet<QString> paths, StartupOption option,
-                           QWidget *parent = 0);
-
+                           QWidget *parent = nullptr);
     ~TraceAnalyzer();
-    EvaluationTool evaluationTool;
 
     void setUpStatusBar();
     void setUpGui();
@@ -81,6 +79,8 @@ private:
 
     QLabel *statusLabel;
     QSet<QString> openedTraceFiles;
+    EvaluationTool evaluationTool;
+    PythonCaller pythonCaller;
 
 private Q_SLOTS:
     void on_menuFile_aboutToShow();
diff --git a/extensions/apps/traceAnalyzer/tracefiletab.cpp b/extensions/apps/traceAnalyzer/tracefiletab.cpp
index 282df492..d5d0feb9 100644
--- a/extensions/apps/traceAnalyzer/tracefiletab.cpp
+++ b/extensions/apps/traceAnalyzer/tracefiletab.cpp
@@ -38,52 +38,50 @@
  */
 
 #include "tracefiletab.h"
-#include "QFileInfo"
 #include "businessObjects/commentmodel.h"
 #include "businessObjects/configmodels.h"
+#include "businessObjects/dramTimeDependencies/phasedependenciestracker.h"
 #include "businessObjects/pythoncaller.h"
 #include "businessObjects/traceplotlinemodel.h"
 #include "businessObjects/tracetime.h"
-#include "businessObjects/dramTimeDependencies/phasedependenciestracker.h"
-#include "qmessagebox.h"
 #include "queryeditor.h"
-#include "qwt_legend.h"
-#include "qwt_plot_canvas.h"
-#include "qwt_plot_curve.h"
-#include "qwt_plot_histogram.h"
-#include "qwt_plot_layout.h"
-#include "qwt_plot_magnifier.h"
-#include "qwt_plot_panner.h"
-#include "qwt_scale_draw.h"
-#include "qwt_scale_widget.h"
+#include "traceanalyzer.h"
 #include "ui_tracefiletab.h"
 
 #include <QCloseEvent>
 #include <QDebug>
 #include <QFileDialog>
+#include <QFileInfo>
 #include <QItemDelegate>
 #include <QMessageBox>
 #include <QStandardItemModel>
 #include <QString>
 #include <QTextStream>
 #include <QtConcurrent/QtConcurrent>
-#include <iostream>
+#include <qwt_legend.h>
+#include <qwt_plot_canvas.h>
+#include <qwt_plot_curve.h>
+#include <qwt_plot_histogram.h>
+#include <qwt_plot_layout.h>
+#include <qwt_plot_magnifier.h>
+#include <qwt_plot_panner.h>
+#include <qwt_scale_draw.h>
+#include <qwt_scale_widget.h>
 
-TraceFileTab::TraceFileTab(QWidget *parent, const QString &path)
+TraceFileTab::TraceFileTab(std::string_view traceFilePath, PythonCaller &pythonCaller, QWidget *parent)
     : QWidget(parent), ui(new Ui::TraceFileTab), commentModel(new CommentModel(this)),
-      navigator(new TraceNavigator(path, commentModel, this)),
+      navigator(new TraceNavigator(traceFilePath.data(), commentModel, this)),
       mcConfigModel(new McConfigModel(navigator->TraceFile(), this)),
       memSpecModel(new MemSpecModel(navigator->TraceFile(), this)),
       availableRowsModel(new AvailableTracePlotLineModel(navigator->GeneralTraceInfo(), this)),
       selectedRowsModel(new SelectedTracePlotLineModel(navigator->GeneralTraceInfo(), this)),
       tracePlotLineDataSource(new TracePlotLineDataSource(selectedRowsModel, this)),
-      depInfosView(new DependencyInfosModel(navigator->TraceFile(), this)),
-      savingChangesToDB(false)
+      depInfosView(new DependencyInfosModel(navigator->TraceFile(), this)), savingChangesToDB(false),
+      pythonCaller(pythonCaller), traceFilePath(traceFilePath)
 {
     ui->setupUi(this);
-    this->path = path;
 
-    std::cout << "Opening new tab for \"" << path.toStdString() << "\"" <<
+    std::cout << "Opening new tab for \"" << traceFilePath << "\"" <<
               std::endl;
 
     ui->mcConfigView->setModel(mcConfigModel);
@@ -96,8 +94,8 @@ TraceFileTab::TraceFileTab(QWidget *parent, const QString &path)
     ui->depInfosView->header()->setSectionResizeMode(QHeaderView::ResizeToContents);
 
     setUpTraceSelector();
-    initNavigatorAndItsDependentWidgets(path);
-    setUpFileWatcher(path);
+    initNavigatorAndItsDependentWidgets(traceFilePath.data());
+    setUpFileWatcher(traceFilePath.data());
     setUpTraceplotScrollbar();
     setUpCommentView();
 
@@ -122,7 +120,7 @@ void TraceFileTab::exportAsVCD()
     QString filename = QFileDialog::getSaveFileName(this, "Export to VCD", "",
                                                     "VCD files (*.vcd)");
     auto dumpVcd = [=]() {
-        QString dump = PythonCaller::instance().exportAsVcd(path);
+        QString dump = pythonCaller.exportAsVcd(traceFilePath.data());
 
         QFile file(filename);
         file.open(QIODevice::WriteOnly | QIODevice::Text);
@@ -249,7 +247,7 @@ void TraceFileTab::closeEvent(QCloseEvent *event)
     if (navigator->existChangesToCommit())
     {
         QMessageBox saveDialog;
-        saveDialog.setWindowTitle(QFileInfo(path).baseName());
+        saveDialog.setWindowTitle(QFileInfo(traceFilePath.data()).baseName());
         saveDialog.setText("The trace file has been modified.");
         saveDialog.setInformativeText("Do you want to save your changes?<br><b>Unsaved changes will be lost.</b>");
         saveDialog.setStandardButtons(QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
diff --git a/extensions/apps/traceAnalyzer/tracefiletab.h b/extensions/apps/traceAnalyzer/tracefiletab.h
index a59e6dbe..2fa3d683 100644
--- a/extensions/apps/traceAnalyzer/tracefiletab.h
+++ b/extensions/apps/traceAnalyzer/tracefiletab.h
@@ -55,6 +55,7 @@
 class CommentModel;
 class McConfigModel;
 class MemSpecModel;
+class PythonCaller;
 
 namespace Ui {
 class TraceFileTab;
@@ -65,7 +66,7 @@ class TraceFileTab : public QWidget
     Q_OBJECT
 
 public:
-    explicit TraceFileTab(QWidget *parent, const QString &path);
+    explicit TraceFileTab(std::string_view traceFilePath, PythonCaller &pythonCaller, QWidget *parent);
     ~TraceFileTab();
 
     void setUpFileWatcher(QString filename);
@@ -75,10 +76,7 @@ public:
     void setUpPossiblePhases();
 
     void initNavigatorAndItsDependentWidgets(QString path);
-    QString getPathToTraceFile()
-    {
-        return path;
-    }
+    QString getPathToTraceFile() { return traceFilePath.data(); }
     void commitChangesToDB(void);
     void exportAsVCD();
 
@@ -101,7 +99,7 @@ protected:
     bool eventFilter(QObject *object, QEvent *event) override;
 
 private:
-    QString path;
+    std::string traceFilePath;
     Ui::TraceFileTab *ui;
     QFileSystemWatcher *fileWatcher;
 
@@ -117,6 +115,8 @@ private:
 
     QAbstractItemModel *depInfosView;
 
+    PythonCaller &pythonCaller;
+
     void setUpQueryEditor(QString path);
     bool savingChangesToDB;