# Re: [NTG-context] problem with math: "\left" leads to "udefined symbol"

On 1/24/2017 2:33 PM, j. van den hoff wrote:

On Tue, 24 Jan 2017 14:15:08 +0100, Hans Hagen <pra...@wxs.nl> wrote:

thanks for the quick reply and sorry for my not being precise.


On 1/24/2017 11:33 AM, j. van den hoff wrote:

hi everybody,

after a 2 year hiatus I'm just giving context' a second try (so, really
not much experience so far).



0.63 what? luatex? then you need to check things as we're beyond 1.00 now


I was refering to the context --version' output:

resolvers       | trees | analyzing 'home:texmf'
mtx-context     | ConTeXt Process Management 0.63
mtx-context     |
mtx-context     | main context file:
path_to/context/tex/texmf-context/tex/context/base/mkiv/context.mkiv
mtx-context     | current version: 2017.01.17 17:37

I _was_ under the impression that this is current since I did an update
and current version' gives a date from last week. or that's what I
believed would happen, when re-running first-setup.sh': am I mistaken?
if this is a stupid question I'd accept a RTFM answer ;-).


the context version is: 2017.01.17 17:37

(best also mention the reported luatex version in such cases)

the 0.63 hardly changes as mtx-context hardly changes




two observations:

1.
in a new document including assorted equations everything went fine
until I tried something like

\startformula
x = \left 1 + 2 \right
\stopformula


\left( ... \right)

left and right take an argument that has to be some known open or
close operator


yes, I know. sorry for the glitch. I _meant_

\startformula
x =  \left ( 1 + 2 \right )
\stopformula

and _that_ is what's still causes the Undefined control sequence'
(both, in the new as well as the two year old unmodified document) --
actually it is thus reported in
the error message (in the previous mail, too):

"l.472 x = \left (
1 + 2 \right )"



this just works here ... so can others confirm it?

\starttext

\startformula
x =  \left ( 1 + 2 \right )
\stopformula

\stoptext


which caused an error:

8<------------------------------------------------------------------
! Undefined control sequence

\strc_synonyms_insert_meaning ...urrentsynonymtag
{#2}\fastsetup
{\??simplel...
\math_left ...ame \??mathleft \meaning \nexttoken
\endcsname
\expandafter \l...
l.472 x = \left (
1 + 2 \right )
8<------------------------------------------------------------------

2.
an old document (not modified these 2 years) does no longer compile due
to apparently the same problem (not understanding \left', \right'.

question: my understanding is, that context' supports "everything" out
of the box (notably equations) and there is no need for explicit loading
of additional packages? so \left' etc. _should be defined (and it
_used_ to work 2 years ago)? what am I missing?

thx, joerg










--

-----------------------------------------------------------------
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
___________________________________________________________________________________`