COM and threading, "CoInitialize"?

[Ferdinand Sousa]

Greetings to list members,

I am trying to use an Acrobat COM object in a class that is subclassed from
threading.Thread.
Since threading.Thread is subclassed, the __init__ method of the inheriting
class must explicitly call the threading.Thread.__init__ method of the
parent. I guess I'm missing something similar for the COM object. Threading
code and traceback below. Any pointers?

CODE:
=================================
class process_file(threading.Thread):

    def __init__(self,connection):
        threading.Thread.__init__(self)
        self.connection=connection

    def run(self):
        ####
        irrelevant code here
        ####

        # Acrobat COM starts
        AVD = win32com.client.Dispatch('AcroExch.AVDoc')   # Traceback
refers to this line (89)
        pdfname=pdfname.replace('.pdf',PDFNAME_SUFFIX)
        AVD.Open(pdf.name, pdfname) # ////////
        print 'opened avdoc'
==================================

TRACEBACK:
==================================
Exception in thread Thread-1:
Traceback (most recent call last):
  File "C:\Python25\lib\threading.py", line 486, in __bootstrap_inner
    self.run()
  File "D:\Ferdinand\#Storage\Ferdi-python\Acrobat Automation\temp
testing.py", line 89, in run
    AVD = win32com.client.Dispatch('AcroExch.AVDoc')
  File "C:\Python25\Lib\site-packages\win32com\client\__init__.py", line 95,
in Dispatch
    dispatch, userName =
dynamic._GetGoodDispatchAndUserName(dispatch,userName,clsctx)
  File "C:\Python25\Lib\site-packages\win32com\client\dynamic.py", line 98,
in _GetGoodDispatchAndUserName
    return (_GetGoodDispatch(IDispatch, clsctx), userName)
  File "C:\Python25\Lib\site-packages\win32com\client\dynamic.py", line 78,
in _GetGoodDispatch
    IDispatch = pythoncom.CoCreateInstance(IDispatch, None, clsctx,
pythoncom.IID_IDispatch)
com_error: (-2147221008, 'CoInitialize has not been called.', None, None)
==================================

TIA. Best regards,
Ferdi
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