zipimport IOError reading Modules.zip in Mac standalone app

[Just]

In article <KJ1Xd.61323$vK5.22269 at twister.nyroc.rr.com>,
 "Bob Swerdlow" <swerdlow at maine.rr.com> wrote:

> We have some users of our application getting error messages like:
>     IOError: zipimport: can not open file 
> /Volumes/MyApp/MyApp.app/Contents/Resources/Modules.zip
> This only happens on our Mac version - the Windows version seems fine.
> 
> Our build is still using bundlebuilder, which creates Modules.zip.  I want 
> to upgrade to py2app, but have not yet done so (we are using py2exe for the 
> Windows version).
> 
> Only a few (7) of our users have had these IOError problems other users are 
> running fine.  The errors they were all either:
>     in shelve.__init__
>     in encodings/__init__.py
>     or in the import to one of our own modules.
> 
> When I look into the Modules.zip file, I see
>     shelve.pyo
>     encodings/__init__.pyo
>     and our own module's pyo file
> 
> So, I don't understand why we get these zipimport IOErrors.
> 
> The application launches more than one process that uses the embedded python 
> (we started using the new subprocess module in this release).  Could that be 
> a problem?  Could it be that more than one process is trying to read 
> Modules.zip at the same time?  If so, what do we do - I don't want to have 
> to include a separate version of the code for each subprocess.
> 
> Any other suggestion?  I need this fixed ASAP.

I've never seen this. You should really upgrade to py2app, and see 
whether that helps.

Just