Dear list,
I wrote a small class which has some COM objects among its attributes. I
need to access the object from different threads so I defined two methods to
marshal and unmarshal the interfaces when working with the object.
Everything seemed to work fine on my PC, never had an error.
But I distributed the module to a user and I have been told that after a few
threads successfully exiting (can be two or hundreds...) something goes
wrong in "unMarshal" and Exception occurred ((-2147022986, 'Der angegebene
Objektexporter wurde nicht gefunden.', None, None)) is reported (it took me
a while to figure out that this is: 0x00000776 - 1910 The object exporter
specified was not found).
Then, but that's obvious, I get Exception occurred ((-2147417827, 'Das
Schnittstellendatenpaket (Marshall/OBJREF) hat ein ungültiges oder
unbekanntes Format.', None, None)) when I try to marshal (unknown or invalid
format).
Since I cannot reproduce the exception I was not able neither to locate
exactly where the exception occurs, nor to find the reason (the only
difference is that I am administrator on my machine and he is not).
Before modifying the code to deal with the exception, (here's the request
for help) I would need help to figure out if I am doing things the wrong way
with threads (I am new to COM and not a software developer) or such
exceptions 'just occurs sometimes'.
Thanks,
Mauro
<code>
class AppInterface(object):
def __init__(self):
self.fmApp = win32com.client.Dispatch("Whatever.Application")
self.fmProject = self.fmApp.Project("Newproject")
def marshal(self):
self.fmAppStream = pythoncom.CoMarshalInterThreadInterfaceInStream(
pythoncom.IID_IDispatch, self.fmApp._oleobj_)
self.fmProjectStream =
pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,
self.fmProject._oleobj_)
def unMarshal(self):
idispatch = pythoncom.CoGetInterfaceAndReleaseStream(
self.fmAppStream, pythoncom.IID_IDispatch)
self.fmApp = win32com.client.Dispatch(idispatch)
idispatch = pythoncom.CoGetInterfaceAndReleaseStream(
self.fmProjectStream, pythoncom.IID_IDispatch)
self.fmProject = win32com.client.Dispatch(idispatch)
</code>
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