Hi all, I am trying to use shared_ptr in my code, but, I encoutered some problems. Here is a piece of my code : The main : boost::shared_ptr<OGRRectangle> rect( new OGRRectangle(5.,TPoint2D <double>(50.,20.),0.1325) ); boost::shared_ptr< rectangle_with_profile<OGRRectangle> > r( new rectangle_with_profile<OGRRectangle> ( rect , 5 , 12 , 1.5 , EXTREME) ); The rectangle_with_profile<T> constructor : template <class Rect_class> rectangle_with_profile<Rect_class>::rectangle_with_profile( boost::shared_ptr<Rect_class> rect , const unsigned int &nb_profiles , const unsigned int &nb_points , const double &distance , const eProfilePosition &position=CENTER ) { m_rectangle = rect; // ... // ... } Just after the line boost::shared_ptr< rectangle_with_profile<OGRRectangle> > r( new rectangle_with_profile<OGRRectangle> ( rect , 5 , 12 , 1.5 , EXTREME) ); the rect<T> destructor is called, and the m_rectangle in rectangle_with_profile handles a deleted pointer ... What am I missing ? Thanks in advance for your help. -- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.