Executable problem - socket?

[Gib Bogle]

Hi,
My student has been developing a GUI (using PyQt and PyQwt) that runs a model 
written in Fortran and built as a DLL.  She has to present on this work 
tomorrow.  She makes an executable version of the Python code with py2exe, and 
the executable runs fine on her Vista laptop and my XP machine.  It doesn't run 
on the PC that she must use for her talk tomorrow.  The Fortran DLL code is 
started up, it writes some text output to a couple of log files, then it fails 
with a WindowsError (000001d) which is a write error.  I suspect that this is 
the first attempt to write to a socket (communication from the DLL to Python is 
via sockets).  The only clue is that the machines that her program runs on have 
Python installed, while the one that fails doesn't.  Therefore I suspect that 
py2exe has omitted a necessary Python DLL.  How can I track down what might be 
missing?

Thanks
Gib