On Tue, May 7, 2013 at 10:46 AM, Hans Hagen <pragma@wxs.nl> wrote:

> On 5/6/2013 8:36 AM, Kip Warner wrote:
>
>> Hey list,
>>
>> I am experiencing two issues in compiling my document. The first is a
>> non-fatal warning during compilation of my book:
>>
>>          ...
>>          (/usr/share/texmf/tex/context/**base/s-abr-02.tex
>>          resolvers       > modules > 'abr-01' is loaded
>>          (/usr/share/texmf/tex/context/**base/s-abr-01.tex))tr: invalid
>>          option -- '
>>          '
>>          Try 'tr --help' for more information.
>>
>>          publications    > wrote a new auxiliary file \jobname.aux
>>          This is BibTeX, Version 0.99d (TeX Live 2012/Debian)
>>          The top-level auxiliary file: Handbook.aux
>>          The style file: cont-au.bst
>>          Database file #1: References/References.bib
>>          (/usr/share/texmf/tex/context/**bib/bibl-apa.tex)
>>          ...
>>
>
> i'm not aware of a "tr" command so it's some kind of side effect i guess
>
>
tr is a unix command that translate or delete characters: for some reason
is executed
from his tex  source.
A similar effect can be done with
\starttext
\ctxlua{os.execute('tr --')}
\stoptext

-- 
luigi