Hi there

Issue solved by deleting the context-internal fonts and recurring on the 
system-wide installed fonts … never mind ;-)

<Untitled_Test -compressed.pdf> 
<https://www.dropbox.com/s/g31kwg14tcs5621/Untitled_Test%20-compressed.pdf?dl=0>

Happy New Year
Heinrich

> 
>> On 3 Jan 2022, at 21:46, Heinrich Paeßens <paess...@me.com 
>> <mailto:paess...@me.com>> wrote:
>>> 
>>> Hi there
>>> 
>>> as a newcomer in ConTeXt I installed according to 
>>> 
>>> https://wiki.contextgarden.net/Installing_ConTeXt_LMTX_on_MacOS/ 
>>> <https://wiki.contextgarden.net/Installing_ConTeXt_LMTX_on_MacOS/>
>>> 
>>> and using TeXShop on macos as advised.
>>> 
>>> However, I like to use STIX2-Fonts for Text and Math and hence my MWE to 
>>> test which fonts are going to be embedded (CLI pdffonts):
>>> 
>>> ————-
>>> \setupbodyfont[stixtwo]
>>> \starttext
>>> 
>>> Test ß 1lIjJuQ \% § \& ?! VERSAL-ẞ- \|> --- 1234567890 --- //
>>> 
>>> \placeformula[eqn:def-m]
>>> \startformula
>>>     m = \frac{m_0}{\sqrt{1-\frac{v^2}{c^2}}}
>>> \stopformula
>>> \stoptext
>>> ————-
>>> 
>>> Unfortunately the compiler throws an error — why is there a check of 
>>> STIX2-fonts versions, why is that important?
>>> 
>>> I checked and found 
>>> 
>>> /Users/hp/Library/Fonts/STIXTwoText-Regular.otf Version 2.12 b168
>>> /Users/hp/Library/context-osx-64/tex/texmf/fonts/opentype/public/stix2-otf/STIXTwoText-Regular.otf
>>>  Version 2.11 b159
>>> 
>>> Could you please advise for a work around?
>>> 
>>> from the log:
>>> 
>>> ————-
>>> fonts           > otf loading > loading 'stixtwotext-regular.otf', hash 
>>> 'stixtwotext-regular'
>>> otf reader      > unknown version '
>>> 
>>> 
>>> 
>>> ' in file 'stixtwotext-regular.otf'
>>> fonts           > otf loading > loading done
>>> fonts           > otf loading > saving 'stixtwotext-regular.otf' in cache
>>> system          > lua > compiling 
>>> '/Users/hp/Library/context-osx-64/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/fonts/otl/stixtwotext-regular.tma'
>>>  into 
>>> '/Users/hp/Library/context-osx-64/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/fonts/otl/stixtwotext-regular.tmd'
>>> system          > lua > dumping 
>>> '/Users/hp/Library/context-osx-64/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/fonts/otl/stixtwotext-regular.tma'
>>>  into 
>>> '/Users/hp/Library/context-osx-64/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/fonts/otl/stixtwotext-regular.tmd'
>>>  stripped
>>> fonts           > otf loading > loading, optimizing, packing and caching 
>>> time 0.002
>>> lua error       > lua error on line 1 in file ./Untitled.tex:
>>> 
>>> registered function call [1129]: 
>>> ...-64/tex/texmf-context/tex/context/base/mkiv/font-otc.lua:325: attempt to 
>>> index a nil value (upvalue 'descriptions')
>>> stack traceback:
>>>     ...-64/tex/texmf-context/tex/context/base/mkiv/font-otc.lua:325: in 
>>> local 'prepare_ligature'
>>>     ...-64/tex/texmf-context/tex/context/base/mkiv/font-otc.lua:770: in 
>>> upvalue 'addfeature'
>>>     ...-64/tex/texmf-context/tex/context/base/mkiv/font-otc.lua:899: in 
>>> local 'enhancer'
>>>     ...-64/tex/texmf-context/tex/context/base/mkxl/font-con.lmt:1269: in 
>>> upvalue 'enhance'
>>>     ...-64/tex/texmf-context/tex/context/base/mkxl/font-con.lmt:1291: in 
>>> field 'apply'
>>>     ...-64/tex/texmf-context/tex/context/base/mkxl/font-otl.lmt:263: in 
>>> field 'load'
>>>     ...-64/tex/texmf-context/tex/context/base/mkxl/font-otl.lmt:602: in 
>>> upvalue 'otftotfm'
>>>     ...-64/tex/texmf-context/tex/context/base/mkxl/font-otl.lmt:630: in 
>>> function <...-64/tex/texmf-context/tex/context/base/mkxl/font-otl.lmt:629>
>>>     (...tail calls...)
>>>     ...-64/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:378: in 
>>> function <...-64/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:366>
>>>     (...tail calls...)
>>>     ...-64/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:484: in 
>>> field 'read'
>>>     ...-64/tex/texmf-context/tex/context/base/mkxl/font-ctx.lmt:1336: in 
>>> function <...-64/tex/texmf-context/tex/context/base/mkxl/font-ctx.lmt:1193>
>>>     (...tail calls...)
>>>  1 >>  \setupbodyfont[stixtwo]
>>> ————-
>>> 
>>> Many thanks for your support.
>>> Kind regards
>>> 
>>> Heinrich Paeßens 
>>> Mobile +49 1512 123 9876 <tel:+4915121239876>
>>> Business Card 
>>> <https://www.paessens.tel/img/heinrich-paessens_bc-2021-03-11_signed.pdf>
>>> 
>> 
> 

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