Puzzle about ms files generated by pandoc

[Robert Goulding]

I used pandoc to generate nicely formatted printouts of s.tmac (because I
want to study it and understand a little better how it works). I tried
several highlight styles; and found that when I used groff to compile the
"monochrome" style, it failed with the error "groff ms macros require groff
extensions; aborting" -- which is odd, because of course I'm using groff!

A partial pdf of the ms macros was generated, but stops the line before the
source reads "groff ms macros require groff extensions; aborting" -- so
that is surely significant. But when I looked at the files generated for
monochrome and for another highlight style ("kate"), I couldn't see where
the error might be. I've attached both - can anyone spot why groff may be
failing *as if *groff were not being used in the groff -ms macros?

Thanks - Robert.

-- 
Robert Goulding
Director, John J. Reilly Center for Science, Technology, and Values;
Director, Program in History and Philosophy of Science;
Assoc. Professor, Program of Liberal Studies,
Fellow, Medieval Institute,
University of Notre Dame.

ms-kate.ms
Description: Binary data

ms-monochrome.ms
Description: Binary data

ms-monochrome.pdf
Description: Adobe PDF document

ms-kate.pdf
Description: Adobe PDF document