COM Server crashing when returning large arrays

[Alastair Alexander]

Bingo! Downloaded release 208 and the problem is solved!


"Stefan Schukat" <SSchukat at dspace.de> wrote in message 
news:mailman.6105.1148382878.27775.python-list at python.org...
Hello Alistair,

which version of pythoncom you are using? In the newer versions there is
an support
for a "native" safearray (the data type Excel is providing). In older
versions the complete
array was converted to a tuple which is very time and memory consuming.
during this
conversion you could run out of memory since you have the Python objects
and the
COM data in your process. I think in 207 the patch was included.

Stefan

> -----Original Message-----
> From: python-list-bounces+sschukat=dspace.de at python.org
> [mailto:python-list-bounces+sschukat=dspace.de at python.org] On
> Behalf Of Alastair Alexander
> Sent: Monday, May 22, 2006 6:27 PM
> To: python-list at python.org
> Subject: COM Server crashing when returning large arrays
>
> Hi ... I'm using pythoncom to create a python COM server
> application that needs to be able to return large arrays to
> COM client apps. For example, I need to be able to return an
> array to Excel that is 500 by 10, with each element of the
> array holding a 32 byte string.
>
> If I run the code for smaller arrays, say 10 by 10, it works
> fine. If I allow the server to try to return the entire 500
> by 10 array, pythonw.exe causes a memory access violation and
> dies and I get an "automation exception" error message in the
> client app.
>
> I assume I'm violating some upper limit for data transfer
> from pythoncom into COM. Anyone know if such limitations
> exist? Is there a way around them?
> Can anyone point me in the right direction?
>
> Thanks
>
> Alastair
>
>
> p.s. 1st message on comp.lang.python, indeed 1st message on
> any news group
>
>
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