pythoncom.CoGetInterfaceAndReleaseStream throws exception in the second time

[ahmad811]

Note that issues in this repository are only for bugs or feature requests in the pywin32.

If you need support or help using this package, please follow these instructions - support or help requests will be closed without comment.

For all bugs, please provide the following information.

• Expected behavior and actual behavior.
  I want to call MyOle in different threads...
  The second myOle.call1 will throw an exception: args:(-2147417827, 'The marshaled inter...n format.', None, None)

• Steps to reproduce the problem.
  In the main.py:
  `
  class My_HTTPServer_RequestHandler(BaseHTTPRequestHandler):
  def do_POST(self):
  self.callFoo()

  def callFoo(self):
  myOle = MyOleWrapper()
  myOle.create()
  myOle.call1()
  # This will throw an exception
  myOle.call1()

def run():
server_address = ('', 80)
httpd = ThreadingHTTPServer(server_address,My_HTTPServer_RequestHandler)
try:
httpd.serve_forever()
except KeyboardInterrupt:
pass
httpd.server_close()

if name == "main":
run()
`

In MyOleWrapper.py
`
from win32com import client
import pythoncom
class MyOleWrapper():

def create(self):
    pythoncom.CoInitialize()
    ole = client.Dispatch('what ever')
    oleid = pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch, old)
    return oleid

def call1(self, oleid):
    pythoncom.CoInitialize()
    x= client.Dispatch(pythoncom.CoGetInterfaceAndReleaseStream(oleid, pythoncom.IID_IDispatch))
    x = client.Dispatch(x)
    # do some stuff with x
    pythoncom.CoUninitialize()

`

• Version of Python and pywin32
  python: 3.7.3
  pywin32: 223

[mhammond]

This is COM throwing the error because it has strict rules around threading - ie, this is a support request, so you need to follow the instructions you quoted at the top of your issue.

If you need support or help using this package, please follow these instructions - support or help requests will be closed without comment.