Incomplete QGLFramebufferObject - missing attachement

Hi,

I am using QGLFramebufferObject and QGLWidget to render a object on scene. I am adding a widget to scene(QGraphicsScene). It shows me an error message on terminal - incomplete qglframebufferobject : missing attachment.

I am running this code on Mac OS. The same code works fine if widget is not added to scene.

If glwidget will have view as parent then it start rendering object without giving any message but while moving glwidget, it overlaps on scrollbars of scene.

Please guide me. Any kind of information on this will help me.

Thanks in advance.

Regards,
Sandip