Hi! You are not in math mode. /Mikael Den sön 19 jan. 2025 10:45Bruce Horrocks skrev:

What am I doing wrong here, please?

\starttext \frac{1}{2} \stoptext

gives

tex error > tex error on line 2 in file ./tt.tex: Missing $ inserted

<inserted text>

$\mathatom <macro> \math_atom_by_parameter_indeed #1->\mathatom \s!class \mathcodechecked {#1} <macro> \math_frac ...meter #2\or \setupcurrentmathfraction [#2]\fi \edef \p_math_fraction_fences {\mathfractionparameter \c!fences }\dostarttagged \t!mfractionstack {\mathfractionparameter \c!mathmeaning }\math_atom_by_parameter \mathfractionparameter \bgroup \ifem ... <to be read again>

{ \frac{ 1}{2}

1 \starttext 2 >> \frac{1}{2} 3 \stoptext I've inserted a begin-math/end-math symbol since I think you left one out. Proceed, with fingers crossed. mtx-context | fatal error: return code: 1

— Bruce Horrocks Hampshire, UK

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