[python-win32] EnsureDispatch throwing fatal error

[Jiawei Li]

I am running the following line of code:

iTunes = win32com.client.gencache.EnsureDispatch('iTunes.Application')

This results in this error:

Traceback (most recent call last):
  File "Helper.py", line 154, in <module>
  File "win32com\client\gencache.pyo", line 529, in
EnsureDispatch
  File "win32com\client\__init__.pyo", line 95, in Dispatch
  File "win32com\client\dynamic.pyo", line 104, in
_GetGoodDispatchAndUserName
  File "win32com\client\dynamic.pyo", line 84, in
_GetGoodDispatch
pywintypes.com_error: (-2147221005, 'Invalid class string',
None, None)

This is being run on a Windows 7 64-bit machine with Python 2.6,
py2exe-0.6.9, and pywin32-214.

Does anyone know the meaning of this cryptic error?
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