Note, this is not a problem in MkIV, just LMTX

On 10/9/2021 15:53, Rik Kabel via ntg-context wrote:
>
> Error with 20211008 ConTeXt:
>
>     ConTeXt  ver: 2021.10.08 20:18 LMTX fmt: 2021.10.9  int:
>     english/english
>
>     ...
>
>     tex error       > tex error on line 1 in file ./mmm.tex: Undefined
>     control sequence \??markingfilter
>
>
>
>     <argument>
>         \csname \??markingfilter
>         \v!default \endcsname {chapter}
>     <macro> \sectionheadmarkingtitle
>         #1#2->\clf_markingtitle {#1}{#2
>         }
>     <macro> \strc_markings_get_yes
>         ...rking \begincsname \??markingclass #1\endcsname
>     {#2}{#3}}\fi \orelse \ifparameter #2\or \markingcommand
>     {#1}{\csname \??markingfilter #2\endcsname {#1}}\else
>     \markingcommand {#1}{\csname \??markingfilter \v!default
>     \endcsname {#1}}
>         \fi \endgroup ...
>     <to be read again>
>
>         \fi
>     <macro> \page_layouts_process_element_indeed
>         ...andcolor #1#2\begincsname \??layouttextstrut
>     \layoutelementparameter \c!strut \endcsname \ignorecrlf \edef
>     \p_width {\layoutelementparameter #3}\ifempty \p_width \else
>     \expandafter \page_layouts_process_element_limited \fi \p_text
>         \endgroup
>     <macro> \currentlayoutelement
>         ...kern -\makeupwidth \fi \letfromlayoutelementparameter
>     \p_text \c!righttext \ifempty \p_text \kern \makeupwidth \else
>     \hbox to \makeupwidth \bgroup \hss
>     \page_layouts_process_element_indeed \c!rightstyle \c!rightcolor
>     \c!rightwidth
>         \egroup \fi
>      ...
>
>     <line 3.12>
>         \stoptext
>
>      1 >>
>      2     %\setupheadertexts [][][{\it\getmarking[chapter]}][] % fails
>      3     \setupheadertexts [][][{\getmarking[chapter]}][] % fails
>      4     %\setupheadertexts [][][\getmarking[chapter]][] % succeeds
>
>     MWE to create. Note that the \it is not necessary to trigger the
>     error, just the braces.
>
>     %\setupheadertexts [][][{\it\getmarking[chapter]}][]  % fails
>     \setupheadertexts [][][{\getmarking[chapter]}][]     % fails
>     %\setupheadertexts [][][\getmarking[chapter]][]       % succeeds
>
>     \starttext
>
>     \chapter{abc}
>     abc
>     \chapter{def}
>     def
>     \stoptext
>
> -- 
> Rik
>
>
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