Re: Math Parameters Can Not Be Resolved From Libertinus Math.

> On 13 Apr 2026, at 16:18, via ntg-context <[email protected]> wrote:
> 
> \definefontfamily [MF] [rm] [libertinusserif]
> \definefontfamily [MF] [ss] [libertinussans]
> \definefontfamily [MF] [tt] [libertinusmono]

> \definefontfamily [MF] [math] [libertinusmath]

It seems this is not a proper opentype math font (there is no MATH table in the TTF). 

So, from ConTeXt's point of view it is just a collection of “math related” separate glyphs, and special code would need to be written to support it.

Best wishes,
Taco

> \setupbodyfont [MF,10.5pt]
> \starttext
> 1234567890
> \im{12_{34}}
> 
> \stoptext
> resolvers       | formats | executing runner 'run luametatex format': /home/lsl_046/Project-Outer/tex/texmf-linux-64/bin/luametatex --jobname="./test.tex" --socket --shell-escape --fmt=/home/lsl_046/Project-Outer/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex/cont-en.fmt --lua=/home/lsl_046/Project-Outer/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex/cont-en.lui  --c:currentrun=1 --c:fulljobname="./test.tex" --c:input="./test.tex" --c:kindofrun=3 --c:maxnofruns=1 --c:once --c:synctex="repeat" --c:texmfbinpath="/home/lsl_046/Project-Outer/tex/texmf-linux-64/bin"
> system          > 
> system          > ConTeXt  ver: 2026.02.19 11:49 LMTX  fmt: 2026.4.3  int: english/english
> system          > 
> system          > 'cont-new.mkxl' loaded
> open source     > level 1, order 1, name '/home/lsl_046/Project-Outer/tex/texmf-context/tex/context/base/mkxl/cont-new.mkxl'
> system          > beware: some patches loaded from cont-new.mkxl
> close source    > level 1, order 1, name '/home/lsl_046/Project-Outer/tex/texmf-context/tex/context/base/mkxl/cont-new.mkxl'
> system          > files > jobname './test', input './test.tex', result './test'fonts           > latin modern fonts are not preloaded
> languages       > language 'en' is active
> system          > synctex functionality is enabled, expect 5-10 pct runtime overhead!
> open source     > level 1, order 2, name './test.tex'
> fonts           > bodyfont '10.5pt' is defined (can better be done global (maybe use \usebodyfont)
> tex error       > tex error on line 8 in file ./test.tex: Math error: parameter 'subshiftdown' with id 49 in style 2 is not set
> 
> <macro> \im 
>    #1->\relax \ifmmode \mathconstruct {\textstyle \indisplaymath \conditionalfalse #1}\else \Ustartmathmode \textstyle \indisplaymath \conditionalfalse \expand \everyinsidemathematics \relax #1\Ustopmathmode 
>    \fi 
> <line 3.8> 
>    \im{12_{34}}
> 
> 1     \definefontfamily [MF] [rm] [libertinusserif]
> 2     \definefontfamily [MF] [ss] [libertinussans]
> 3     \definefontfamily [MF] [tt] [libertinusmono]
> 4     \definefontfamily [MF] [math] [libertinusmath]
> 5     \setupbodyfont [MF,10.5pt]
> 6     \starttext
> 7     1234567890
> 8 >>  \im{12_{34}}
> 9     
> 10     \stoptext
> 11     
> Sorry, but I can't typeset math unless various parameters have been set. This isnormally done by loading special math fonts into the math family slots. Your font
> set is lacking at least the parameter mentioned earlier.
> mtx-context     | fatal error: return code: 1
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— 
Taco Hoekwater              E: [email protected]
genderfluid (all pronouns)


___________________________________________________________________________________
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maillist : [email protected] / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
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