Friday, August 13, 2004 Christopher Creutzig wrote:
Giuseppe,
you may or may not know about these problems already, so I decided to simply send them all. I'm using t-nath.tex 2003.12.08, updated five minutes ago from www.tug.org, ConTeXt 2004.6.26, and pdfeTeX 3.14159-1.10b-2.1 (Web2C 7.4.5).
nath seems to have trouble with $$...$$-formulas. This file won't compile:
\usemodule[nath]
\starttext \placeformula $$a$$ \stoptext
Error message: Runaway argument? \@@dollar {\to \asciiB \ExpandBothAfter \doifincsnameelse \asciiA \asciiB \ETC. ! File ended while scanning use of \convertargument.
Replacing $$...$$ by \startformula...\stopformula fixes this,
That's because nath recatcodes the $ signs and the original definition of \placeformula doesn't work when they are active. (Hans, can we look into this together, please?) Don't use $$ ... $$ with \placeformula (they should work ok for numberless formulas though). Actually, you've hit on one of the most strange bugs in the nath module: it didn't support use of \startformula ... \stopformula either! It *seemed* to work, but it didn't really act properly. You may want to try your examples with \[ ... \] instead of \startformula ... \stopformula, and see if you still have the problems. In the mean time, I will upload a new version of nath which should also allow use of \startformula.
Another bug: t-nath.tex defines \savecatcode and \restorecatcode, but these names have already been used in verb-ini.tex. I have locally replaced these with \nath!savecatcode and \nath!restorecatcode, seems to work.
Thanks for spotting it! -- Giuseppe "Oblomov" Bilotta