[PyCUDA] does anyone know what to do about a Boost.Python.ArgumentError ?

[Michael Rule]

I am now getting the following error when trying to launch a kernel,
and I do not know how to proceed. Google/searching the wiki have not
provided any clues yet :

File "/usr/lib/python2.5/site-packages/pycuda-0.92-py2.5-linux-x86_64.egg/pycuda/driver.py",
line 184, in function_prepared_call
    func.launch_grid(*grid)
Boost.Python.ArgumentError: Python argument types in
    Function.launch_grid(Function, NoneType, int)
did not match C++ signature:
    launch_grid(cuda::function {lvalue}, int, int)

sincerely,
mrule

p.s. at the moment I believe that this is something different from
http://tiker.net/pipermail/pycuda_tiker.net/2009-April/000309.html,
although it is the same error message