Platform: cygwin texlive 2012 (from texlive org) Test TeX file: ---------------------- /stoptext This is a pen /stoptext ---------------------- Result: --------------------------------------------------------------------------------------------------------------------------------- $ texexec -o pdf test.tex /usr/local/texlive/2012/texmf-dist/scripts/context/ruby/base/switch.rb:21: Use RbConfig instead of obsolete and deprecated Config. /usr/local/texlive/2012/texmf-dist/scripts/context/ruby/base/switch.rb:570:in `locateseries': undefined method `each' for "o":String (NoMethodError) from /usr/local/texlive/2012/texmf-dist/scripts/context/ruby/base/switch.rb:397:in `block in expand' from /usr/local/texlive/2012/texmf-dist/scripts/context/ruby/base/switch.rb:392:in `each' from /usr/local/texlive/2012/texmf-dist/scripts/context/ruby/base/switch.rb:392:in `expand' from /usr/local/texlive/2012/texmf-dist/scripts/context/ruby/texexec.rb:789:in `<main>' ----------------------------------------------------------------------------------------------------------------------------------- I must have some sort of configuration or Ruby compatibility problem, but, I haven't any idea what it is or what to do about it. Can anyone help me out or give me some ideas. Thank you.