I've been trying to get the Tesseract-OCR gem to work on a Windows 7 system, but it keeps throwing up errors due to the FFI-Inline gem. From what I can tell, the problem might be that Windows doesn't …
So:
a) It can cope with spaces in filenames
b) If it fails, it doesn't upload the last CV text processed (so it deletes any existing tmp.txt before running).