object has no attribute '__ctypes_from_outparam__' error when number of arguments in a function is >= 32.

[irfanilgin]

We use comtypes to call our library (C++) from Python (>=3.5).

We have encountered following error, which can not be traced by Python debugger.

We are creating the function calls in the following manner.

engine = CreateObject("ProgID")

When the COM function has >= 32 arguments (this is the common property we have observed in errors) exception AttributeError "object has no attribute '__ ctypes_from_outparam __' " is raised.

Although I have applied the suggested changes in issue number #87 and #88 , this does not solve the problem.

Interestingly when engine is created in the following manner,

engine = CreateObject("ProgID", dynamic=True)

The exception disappears, however this reduces usability since user needs to call GetBestInterface on all the com objects returned as they are all IDispatch in that case.

Unfortunately I can not pinpoint from which line this AttributeError is originated as the exception can not be correctly traced in python,

Any help is highly appreciated.