> Jan Tosovsky <mailto:j.tosovsky@email.cz>
> 15. Oktober 2015 um 20:05
> Dear All,
>
> I've updated context, tried to regenerate my tex source and it doesn't
> compile any more. It was Ok in 0.79 (in March).
>
> I am getting tex error after these 3 lines (followed by a blank line and
> other lines):
>
> ...
> \definestructureconversionset[frontpart:pagenumber][][romannumerals]
> \definestructureconversionset[bodypart:pagenumber] [][numbers]
> \definestructureconversionset[backpart:pagenumber] [][numbers]
>
> \startsectionblockenvironment[frontpart]
> \setupuserpagenumber[numberconversion=romannumerals]
> \stopsectionblockenvironment
> ...
>
> tex error > tex error on line 22 in file D:/source.tex: ! Missing {
> inserted
>
> <to be read again>
> \edef
> \currentlistsymbol ->\edef
> \p_symbol {\listparameter \c!symbol
> }\doifelseins...
> \14>:113>:abc ...numbercommand \currentlistsymbol
> }\else \setbox
> \b_strc_lis...
> \strc_lists_apply_renderingsetup ...nderingsetup }
> \relax \the
> \t_lists_every...
> \strc_lists_entry_process ...i \fi \fi \endcsname
> \dostoptagged
> \listextrapa...
> \strclistsentryprocess ...trc_lists_entry_process
> \clf_poplist
> ...
> l.150
>
> Any idea how to fix this?
Without a minimal example I can only guess.

What I can take from the error message is that you have a problem with 
the list mechanism.

To try fixing the problem comment first a list settings where you apply your
own commands (e.g. the pagecommand key) and when this doesn't help
(don't forget to delete the tuc-file) you can comment the complete
\setuplist setting.

Wolfgang