I've had a similar issue since December (posted here: https://www.mail-archive.com/ntg-context@ntg.nl/msg101228.html) and trying the examples from the columnsets manual today and the version that worked for Hraban I get the same error (ConTeXt version  2022.05.02, macOS 12.4).

Ben


On Tue, 24 May 2022, at 20:42, T. Kurt Bond via ntg-context wrote:
> Sigh.  I should have mentioned that that I reinstalled LMTX from scratch on both machines, and that my mac is running macOS Monterey 12.3.1.
> 
> On Tue, May 24, 2022 at 3:40 PM T. Kurt Bond <tkurtbond@gmail.com> wrote:
>> Huh.  I tried it on a Linux box, and that worked.  But on my main machine, a Intel 64 bit mac, I get the original result.  Oh, I changed to use this input:
>>> \definecolumnset[TwoColumns][n=2]
>>> \startcolumnset [TwoColumns]
>>>   \input knuth
>>> \stopcolumnset
>> 
>> On Tue, May 24, 2022 at 3:09 PM Henning Hraban Ramm via ntg-context <ntg-context@ntg.nl> wrote:
>>> Am 24.05.22 um 20:43 schrieb T. Kurt Bond via ntg-context:
>>> > Given the following file that uses definecolumnset and 
>>> > startcolumnset/stopcolumnset (largely from the wiki 
>>> > <https://wiki.contextgarden.net/Command/definecolumnset>) for input:
>>> > 
>>> >     %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>>> >     \setuppapersize[letter]
>>> >     \definecolumnset[TwoColumns][n=2]
>>> >     \startcolumnset [TwoColumns]
>>> >        \title{Test page}
>>> >        \framed
>>> >          [frame=off,
>>> >           bottomframe=on,
>>> >           width=\textwidth,
>>> >           frameoffset=1mm,
>>> >           foregroundstyle=small,
>>> >          ]{\copyright\ \date[][year] Donald E. Knuth}
>>> >        \input knuth
>>> >     \stopcolumnset
>>> >     %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>>> 
>>> That’s not a minimal example, but it works for me (even if the text 
>>> starts only on the second page):
>>> 
>>> \definecolumnset[TwoColumns][n=2]
>>> 
>>> \starttext
>>> \startcolumnset [TwoColumns]
>>>    \title{Test page}
>>>    \framed
>>>      [frame=off,
>>>       bottomframe=on,
>>>       width=\textwidth,
>>>       frameoffset=1mm,
>>>       foregroundstyle=small,
>>>      ]{\copyright\ \date[][year] Donald E. Knuth}
>>>    \samplefile{knuth}
>>> \stopcolumnset
>>> \stoptext
>>> 
>>> Hraban
>>> ___________________________________________________________________________________
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>>> 
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>>> ___________________________________________________________________________________
>> 
>> 
>> -- 
>> T. Kurt Bond, tkurtbond@gmail.com, https://tkurtbond.github.io
> 
> 
> -- 
> T. Kurt Bond, tkurtbond@gmail.com, https://tkurtbond.github.io
> ___________________________________________________________________________________
> 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://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>