File "pyglet\resource.pyc", line 577, in media
File "pyglet\media\__init__.pyc", line 1386, in load
File "pyglet\media\avbin.pyc", line 247, in __init__
WindowsError: exception: access violation writing 0x6E6BB26C
The problem was that DEP was turned on for all programs in the Vista control panel. Once DEP was restricted only to system programs, it ran normally.
Paul