[vtkusers] Error during cleanup: wglMakeCurrent failed in Clean()

[Zamir Khan]

Thanks Francois - I have tried this before (it *does* seem the logical 
thing to do), but the initial problem remains and I also then see an 
additional exception occur on all platforms:

"Unhandled exception at 0x77644401 in XXXX.exe: 0xC015000F: The 
activation context being deactivated is not the most recently activated 
one."

It could be that this is a step in the right direction, but more changes 
are needed - I'm not sure!

Francois Bertel wrote:
> Hello,
>
> Swap your two parts: delete the renderer first and then the renderwindow.
>
>
> The reason is that RemoveAllViewProps() (implemented in
> vtkViewport.cxx, superclass of vtkRenderer) calls
> ReleaseGraphicsResources() on each prop which requires (indirectly) a
> valid window. For example, a prop like vtkActor will call
> ReleaseGraphicsResources() on its texture to release the OpenGL
> texture object id.
>
>
> On Wed, Nov 25, 2009 at 11:19 AM, Zamir Khan <zkhan at modusmed.com> 
> <mailto:zkhan at modusmed.com%3E> wrote:
> > I am seeing the following errors from a VTK 5 / MFC application when 
> I close
> > it:
> >
> > ERROR: In ..\..\Rendering\vtkWin32OpenGLRenderWindow.cxx, line 113
> > vtkWin32OpenGLRenderWindow (0685AF70): wglMakeCurrent failed in Clean(),
> > error: 6
> >
> > ERROR: In ..\..\Rendering\vtkWin32OpenGLRenderWindow.cxx, line 113
> > vtkWin32OpenGLRenderWindow (0698BAE8): wglMakeCurrent failed in Clean(),
> > error: 6
> >
> > The error will appear 2 or 3 times in the debug output file, 
> depending on
> > what actions I have taken in the program (I assume for the instances of
> > vtkRenderWindow that are problematic). Also, I can only reproduce it on
> > certain platforms (doesn't happen on machine with NVIDIA, but does on
> > machine with Intel integrated graphics). I have searched the mailing 
> list
> > and the recommendation appears to be to make sure to Finalize() the
> > vtkRenderWindow (there are 3 of them being instantiated in this
> > application). In the destructor of each of the classes that instantiate
> > vtkRenderWindows, I have the following code snippets:
> >
> >   if (renWin)
> >   {
> >       renWin->Finalize();
> >       renWin->Delete();
> >   }
> >   if (renderer)
> >   {
> >       renderer->RemoveAllViewProps();
> >       renderer->Delete();
> >   }
> >
> > However, this does not resolve the issue. Any help is appreciated!
> >
> > Thanks,
> > Zamir
> >
> > --
> > Zamir Khan
> > Modus Medical Devices
> > e-mail: zkhan at modusmed.com <mailto:zkhan at modusmed.com>
> >
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>
>
> -- 
> François Bertel, PhD | Kitware Inc. Suite 204
> 1 (518) 371 3971 x113 | 28 Corporate Drive
> | Clifton Park NY 12065, USA
> _______________________________________________
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>
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