tried to create pdftex-t.pdf from pdftex-t.tex at PRAGMA

[Thomas Porter <txporter@mindspring.com>]

Hello again!

After creating a wonderful presentation introducing TeX and friends for a local
Linux users using ConTeXt, I wanted to run the pdftex-t.tex file from Pragma
and see if I got the same thing as in the pdftex-l.pdf file.  (I like doing
this sort of thing when I find both the source and finished PDF file, since it
lets me see if my install is set up correctly.)

I got an error in ConTeXt pointing to the following as an undefined control
sequence:

\SubSub #1->$\blacktriangleright 
                               $

I think this blacktriangleright is part of AMS symbols, but how do I get
ConTeXt to know to use them? or might this be a font problem?  I am using teTeX
1.0 and ConTeXt from 10-24-99, pdftex 14.c.

Thanks,

-- 
Tom Porter                                       txporter@mindspring.com
------------------------------------------------------------------------
"On two occasions I have been asked [by members of Parliament], 
'Pray, Mr. Babbage, if you put into the machine wrong figures, will 
the right answers come out?'  I am not able rightly to apprehend the 
kind of confusion of ideas that could provoke such a question."