[vtkusers] Occurring vtkDebugLeaks even smartpointers are used

[ran]

Thank you very much for the support,
My QVTKOpenGLWidget, vtkGenericOpenGLRenderWindow related code is like this
as per vtk tutorial

The app has a main Qt widget file

*/widget.h declaration file/*

     QPointer<QHBoxLayout> m_loMain;   

    vtkNew <vtkGenericOpenGLRenderWindow> m_vtkRenderWindow1;
    QPointer <QVTKOpenGLWidget> m_vtkWgtWin1;

    vtkNew <vtkGenericOpenGLRenderWindow> m_vtkRenderWindow2;
    QPointer <QVTKOpenGLWidget> m_vtkWgtWin2;

    vtkNew <vtkGenericOpenGLRenderWindow> m_vtkRenderWindow3;
    QPointer <QVTKOpenGLWidget> m_vtkWgtWin3;

*/and defined in widget.cpp constructor/*

   QPointer<QHBoxLayout> m_loMain;   

   m_vtkWgtWin1 = new QVTKOpenGLWidget(this);
   m_vtkWgtWin1->SetRenderWindow(m_vtkRenderWindow1);
   m_loMain->addWidget(m_vtkWgtWin1);

   m_vtkWgtWin2 = new QVTKOpenGLWidget(this);
   m_vtkWgtWin2->SetRenderWindow(m_vtkRenderWindow2);
   m_loMain->addWidget(m_vtkWgtWin2);

   m_vtkWgtWin3 = new QVTKOpenGLWidget(this);
   m_vtkWgtWin3>SetRenderWindow(m_vtkRenderWindow3);
   m_loMain->addWidget(m_vtkWgtWin3);

*/and in app main class/*

    // before initializing QApplication, set the default surface format.
    QSurfaceFormat fmt = QVTKOpenGLWidget::defaultFormat();
    fmt.setSamples(0);
    QSurfaceFormat::setDefaultFormat(fmt);

have any issue in this code?

*/Also i tried with the format /*
QVTKOpenGLWidget::SetRenderWindow(vtkGenericOpenGLRenderWindow::Get());
but this also not solving the issue



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