On Sun, Sep 18, 2016 at 9:56 PM, Henri Menke <henrimenke@gmail.com> wrote:
> You can start itemize only in vertical mode.  To switch to vertical mode use \blank.  To kill the empty line which is inserted use \blank[-line].
>
> \starttext
> \startitemize[n]
> \item \blank[-line]
> \startitemize[a,horizontal,three]
> \startitem First \stopitem
> \startitem Second \stopitem
> \startitem Third \stopitem
> \startitem Fourth \stopitem
> \stopitemize
> \item On the outer level
> \stopitemize
> \stoptext
>
> On 09/18/2016 10:54 AM, Mikael P. Sundqvist wrote:
>> Hi
>>
>> 1) the following code
>>
>> \starttext
>> \startitemize[n]
>> \item
>> \startitemize[a,horizontal,three]
>> \startitem First \stopitem
>> \startitem Second \stopitem
>> \startitem Third \stopitem
>> \startitem Fourth \stopitem
>> \stopitemize
>> \item On the outer level
>> \stopitemize
>> \stoptext
>>
>> generates the error
>>
>> tex error       > tex error on line 9 in file
>> /home/mickep/tmp/ctx-listexample14.tex: ! You can't use `\prevdepth'
>> in restricted horizontal mode
>>
>> Isn't it possible to have nested itemize with key horizontal?
>>
>> 2) If I change the horizontal key to columns, then there is an extra
>> line (the extra line in nested itemization has been discussed before,
>> but not with these keys given, as far as I could see). I.e. the file
>>
>> \starttext
>> \startitemize[n]
>> \item
>> \startitemize[a,columns,three]
>> \startitem First \stopitem
>> \startitem Second \stopitem
>> \startitem Third \stopitem
>> \startitem Fourth \stopitem
>> \stopitemize
>> \item On the outer level
>> \stopitemize
>> \stoptext
>>
>> gives the attached pdf file, where I would have exptected the first a.
>> in the inner itemize to be on the same line as the 1. in the outer
>> itemize.
>>
>> Anyone has an idea on what is going on here?
>>
>> Best regards, Mikael
>>
>>
>>
>> ___________________________________________________________________________________
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>>
>> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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>> ___________________________________________________________________________________
>>
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________


Thank you Henri, that works, and I can live with adding \blank[-line]
in these cases.

I still wonder if there is an automatic way, since it seems to only
happen when one has the inner itemize in columns. For example, with

\starttext
\startitemize[n]
\item
\startitemize[a]
\startitem First \stopitem
\startitem Second \stopitem
\startitem Third \stopitem
\startitem Fourth \stopitem
\stopitemize
\item On the outer level
\stopitemize
\stoptext

there is no extra line (result is attached).

/Mikael