Get "...is not a valid Win32 application." when trying to run Python script

[bwilder]

Hi,
VBP 8.0 x64
Windows 7 ultimate host

I'm trying to run a new Python script through a Batch File step and the step is immediately failing with the error "... is not a valid Win32 application." The script pushes files from the localhost up to a remote linux server. When I run the script from the command line, it works as expected. No error, all files go where I expect.

I've got several other python scripts used for things like checking file sizes, parsing logs, and moving files that all work fine through VBP without issue. I've tried this script on a couple of different windows hosts all with the same results; script runs fine from command line, but dies immediately in VBP.

Any thoughts?