Py2exe problems running Pythoncard app

When I run my app after building a py2exe app with this command line

python setup.py py2exe -b1 -c

My app crashes on startup, but does not make a .log file.
The dialog displays Microsoft Visual C++ Runtime Library "Runtime Error!"
"The application requested that the Runtime terminate it in an unusual way"


When I change the build line to
python setup.py py2exe -c

My app launches just fine, but then there is a directory full of many
dlls and pyds.

setup.py looks like this

from distutils.core import setup
import py2exe


setup(windows=['WxGui.py'], zipfile=None)

Why does my app crash when it is built one way, but not the other?


thanks

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