Re: problem with math: "\left" leads to "udefined symbol"

["j. van den hoff" <veedeehjay@gmail.com>]

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

thanks for the quick reply and sorry for my not being precise.  
correction/addition follows:

> 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).
>>
>> I updated to the latest version (0.63) before proceeding.
>
> 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 ;-).

>
>> 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 )"

>
>> 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
>>
>
>


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