[Paraview] xlib error

[Joel Howard Willis Weinberger]

Recently I have been trying to call InteractiveRender() in a new render 
module I've been writing. In turn, it's been giving me the following 
error:

Xlib: unexpected async reply (sequence 0x4b)!

I also discovered that I can get the same error by calling Render() on a 
vtkRenderWindow after start() has been called on a
vtkRenderWindowInteractor that contains the aforementioned 
vtkRenderWindow.

Any ideas on what this is about, and how I can call InteractiveRender in 
my module?

--Joel W