diff --git a/src/blackgui/guiapplication.cpp b/src/blackgui/guiapplication.cpp
index 8fb5038ac..143e21c32 100644
--- a/src/blackgui/guiapplication.cpp
+++ b/src/blackgui/guiapplication.cpp
@@ -160,14 +160,17 @@ namespace BlackGui
         return m;
     }
 
-    void CGuiApplication::initMainApplicationWindow(QWidget *mainWindow) const
+    void CGuiApplication::initMainApplicationWindow(QWidget *mainWindow)
     {
         if (!mainWindow) { return; }
+        if (this->m_uiSetupCompleted) { return; }
+        this->m_uiSetupCompleted = true;
         const QString name(this->getApplicationNameVersionBetaDev());
         mainWindow->setObjectName(QCoreApplication::applicationName());
         mainWindow->setWindowTitle(name);
         mainWindow->setWindowIcon(m_windowIcon);
         mainWindow->setWindowIconText(name);
+        emit this->uiObjectTreeReady();
     }
 
     void CGuiApplication::setWindowIcon(const QPixmap &icon)
diff --git a/src/blackgui/guiapplication.h b/src/blackgui/guiapplication.h
index d2514031d..b7ff3e0bd 100644
--- a/src/blackgui/guiapplication.h
+++ b/src/blackgui/guiapplication.h
@@ -97,7 +97,7 @@ namespace BlackGui
         void processEventsToRefreshGui() const;
 
         //! Init the main application window based on information in this application
-        void initMainApplicationWindow(QWidget *mainWindow) const;
+        void initMainApplicationWindow(QWidget *mainWindow);
 
         //! \name print messages generated during parsing / cmd handling
         //! @{
@@ -156,6 +156,9 @@ namespace BlackGui
         //! Style sheet changed
         void styleSheetsChanged();
 
+        //! Object tree ready (means ui->setupUi() completed)
+        void uiObjectTreeReady();
+
     protected slots:
         //! Startup competed
         virtual void ps_startupCompleted() override;
@@ -178,7 +181,8 @@ namespace BlackGui
         QCommandLineOption m_cmdWindowStateMinimized { "empty" }; //!< window state (minimized)
         QCommandLineOption m_cmdWindowMode { "empty" };           //!< window mode (flags: frameless ...)
         CStyleSheetUtility m_styleSheetUtility{{}, this};         //!< style sheet utility
-        QScopedPointer<QSplashScreen>      m_splashScreen;        //!< splash screen
+        QScopedPointer<QSplashScreen> m_splashScreen;             //!< splash screen
+        bool m_uiSetupCompleted = false;                          //!< ui setup completed
 
         //! Qt help message to formatted HTML
         static QString beautifyHelpMessage(const QString &helpText);