Dear List,
i hope somone can help me.

This litte example is from the wiki, i wanted to try \placeformula
\placeformula[formula:aformula]
\startformula
y=x^2
\stopformula
\placeformula
\startformula
\int_0^1 x^2 dx
\stopformula


After compiling there is no PDF Page . But this:

Command Line:   context.exe --synctex=-1 "mathtry.tex"
Startup Folder: C:\Users\Administrator\Downloads\cont-tmf\doc\context\sources\general\magazines


resolvers       | formats | executing runner 'run luametatex format': luametatex --jobname="./mathtry.tex" --socket --shell-escape --fmt=C:/texlive/2023/texmf-var/luametatex-cache/context/1b4da46d1f340757f9984eae810b1464/formats/luametatex/cont-en.fmt --lua=C:/texlive/2023/texmf-var/luametatex-cache/context/1b4da46d1f340757f9984eae810b1464/formats/luametatex/cont-en.lui  --c:currentrun=1 --c:fulljobname="./mathtry.tex" --c:input="./mathtry.tex" --c:kindofrun=1 --c:maxnofruns=9 --c:synctex="-1" --c:texmfbinpath="C:/texlive/2023/bin/windows"
system          >
system          > ConTeXt  ver: 2023.05.05 18:36 LMTX  fmt: 2023.6.1  int: english/english
system          >
system          > 'cont-new.mkxl' loaded
open source     > level 1, order 1, name 'C:/texlive/2023/texmf-dist/tex/context/base/mkxl/cont-new.mkxl'
system          > beware: some patches loaded from cont-new.mkiv
close source    > level 1, order 1, name 'C:/texlive/2023/texmf-dist/tex/context/base/mkxl/cont-new.mkxl'
system          > 'cont-sys.mkxl' loaded
open source     > level 1, order 2, name 'C:/texlive/2023/texmf-dist/tex/context/texlive/cont-sys.mkxl'
close source    > level 1, order 2, name 'C:/texlive/2023/texmf-dist/tex/context/texlive/cont-sys.mkxl'
system          > files > jobname './mathtry', input './mathtry.tex', result './mathtry'
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 3, name './mathtry.tex'
fonts           > beware: no fonts are loaded yet, using 'lm mono' in box
tex error       > tex error on line 4 in file ./mathtry.tex: \textfont0 is undefined in ordinal, font id 0, character 63)

<macro>
    \endgroup \Ustopmathmode
<macro>
    \stopforceddisplaymath
    \egroup \ifcase \c_strc_formulas_frame_mode \else \strc_math_number_check_offsets \fi \ifcase \c_strc_formulas_frame_mode \strc_math_number_check \or \strc_math_number_check_outside \else \strc_math_number_check_inside \fi \str
<macro>
    \endgroup \strc_formulas_endstrut \stopinnermath
    \afterdisplayspace \egroup
<macro> \p_threshold
    \strc_formulas_place_number \strc_formulas_flush_number \dostarttagged \t!formulacontent \empty \dotagregisterformula \c_strc_formulas_n \csname \e!stop \formulaparameter \c!alternative \v!formula \endcsname
    \dostoptagged \dostoptagged \nonoindentati
<line 3.4>
    \stopformula

 1     \placeformula[formula:aformula]
 2     \startformula
 3     y=x^2
 4 >>  \stopformula
 5     \placeformula
 6     \startformula
 7     \int_0^1 x^2 dx
 8     \stopformula
 9
10
Somewhere in the math formula just ended, you used the stated character from an
undefined font family. For example, plain TeX doesn't allow \it or \sl in
subscripts. Proceed, and I'll try to forget that I needed that character.
mtx-context     | fatal error: return code: 1

Many regards
Uschi Hermann
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 ConTeXt Compilation Report (Pages: 0)

 Errors: 0   Warnings: 0   Bad Boxes: 0