Originally posted by Justin Kirby:

Thanks Chris, re-naming the files to use dashes instead of periods fixed the issue!

Thanks for reporting back! I'm glad it was an easy workaround. Please don't hesitate to reach out if you have more issues or feedback. If there's anything I can do to make mri_reface more usable for TCIA and similar projects, I would do my best to make that happen. 

Chris