[vtkusers] mayavi ValueError: method requires a vtk object

[Karl Garsha]

Greetings,
I've built VTK 4.2 + Python2.2 with Tkinter on LinuxPPC (Kernel 
2.4.20-ppc-r3) and everything works well (at least the examples I've 
tried).
	I'm trying to run MayaVi--I've installed using the setup.py script and 
there were no errors.  When I run the test_vtk.py script in the docs 
directory everthing checks out A-OK. I can import mayavi in the python 
interpreter without incident.  As far as I can tell everything should be 
in order, but I'm having problems getting MayaVi to run with the 
"mayavi" command.
	The error I get follows:

 > mayavi&
[1] 26883
 > Traceback (most recent call last):
   File "/usr/local/bin/mayavi", line 277, in ?
     app = MayaViTkGUI (r)
   File "/usr/local/lib/python2.2/site-packages/mayavi/Main.py", line 
779, in __init__
     self.renwin = Misc.RenderWindow.RenderWindow (self.renwin_frame)
   File 
"/usr/local/lib/python2.2/site-packages/mayavi/Misc/RenderWindow.py", 
line 124, in __init__
     mode='vtk')
   File "/usr/local/lib/python2.2/site-packages/mayavi/Misc/Lights.py", 
line 696, in __init__
     self.lights = self._create_lights()
   File "/usr/local/lib/python2.2/site-packages/mayavi/Misc/Lights.py", 
line 704, in _create_lights
     lights.insert(i, Light())
   File "/usr/local/lib/python2.2/site-packages/mayavi/Misc/Lights.py", 
line 36, in __init__
     self.glyph = LightGlyph()
   File "/usr/local/lib/python2.2/site-packages/mayavi/Misc/Lights.py", 
line 160, in __init__
     capmapper.SetInput(pdata)
ValueError: method requires a VTK object

	I'm not sure what to make of this--has anyone seen this before? 
Compared to OS X (which I scrapped because I finally realized that it 
didn't permit software rendering for OpenGL, and I'm running an older 
video subsystem) things have been pretty smooth on LinuxPPC (things 
compile about 5x faster too).  Any insights would be much appreciated.
Thanks in advance and best regards,
Karl