[lltx] lualatex-math cannot find unpack function

Ulrike Fischer news3 at nililand.de
Sat Aug 3 17:13:24 CEST 2013

Am Sat, 3 Aug 2013 16:40:20 +0200 schrieb Martin Schröder:

> 2013/8/3 Wolfgang Jeltsch <g9ks157k at acme.softbase.org>:
>> if I import both amsmath and lualatex-math, I get the following error
>> message when LuaLaTeX tries to process \begin{document}:
>> ! LuaTeX error
>> .../texmf-dist/tex/lualatex/lualatex-math/lualatex-math.lua:46:
>> attempt to call upvalue 'unpack' (a nil value)
>> stack traceback:
>>         .../texmf-dist/tex/lualatex/lualatex-math/lualatex-math.lua:46:
>>         in function 'print_class_fam_slot'
>>         [string "\directlua "]:1: in main chunk.
>> \__lltxmath_set_mathchar:NN ...\int_eval:n {`#2})}
>>                                                   \scan_stop:
>> What is the reason for this?
> Which version of LuaTeX do you use?

I can reproduce the problem on TeXLive 2013 with 
This is LuaTeX, Version beta-0.76.0-2013061707

and this example:


There is no problem in miktex

> PS: IMHO this question is off-topic for this list; you should have
> asked on e.g. http://tex.stackexchange.com/

I think problems with lualatex packages are on-topic on this list.

Ulrike Fischer 

More information about the lualatex-dev mailing list