[vtkusers] MakeCurrent error with multiple renderwindows and vtkPropPicker

[LauraLC]

Hi, 

I have add the same actor into 2 qvtkWidget,  and for the renderwindow of
one qvtkWidget, I add an InteractorStyle with vtkPropPicker; 
now the problem is: if I click the actor in the first qvtkWidget, and then
click it in another qvtkWidget, then click in the first qvtkWidget again,
the error pops up: 
---------------
ERROR: In C:\Activiz\VTK7.1\Rendering\OpenGL\vtkWin32OpenGLRenderWindow.cxx,
line 248
vtkWin32OpenGLRenderWindow (000002A17C00FD20): Attempting to call
MakeCurrent for a different window than the one doing the picking, this can
causes crashes and/or bad pick results
-----------------

is there any body know what's the problem and how to handle it? 

Thanks



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