%%%%%%%%%

\starttext
.
\startluacod= e
context([[
\starttyping

foobar
\stoptyping
]])
\sto= pluacode
\stoptext

tex error =C2=A0 =C2=A0 = =C2=A0 > tex error on line 5 in file ./test.tex:

lua error:
=C2=A0 =C2=A0 =C2=A0 =C2=A0 registered function call [1041]: ...mtx/tex/t= exmf-context/tex/context/base/mkxl/buff-ini.lmt:534: invalid value (nil) at= index 3 in table for '
concat'
stack traceback:
=C2=A0 = =C2=A0 =C2=A0 =C2=A0 [C]: in function 'table.concat'
=C2=A0 =C2= =A0 =C2=A0 =C2=A0 ...mtx/tex/texmf-context/tex/context/base/mkxl/buff-ini.l= mt:534: in upvalue 'pickup'
=C2=A0 =C2=A0 =C2=A0 =C2=A0 ...mtx/t= ex/texmf-context/tex/context/base/mkxl/buff-ini.lmt:677: in function <..= .mtx/tex/texmf-context/tex/context/base/mkxl/buff-ini.lmt:668>
=C2=A0= =C2=A0 =C2=A0 =C2=A0 (...tail calls...)

<= /div>

Sylvain

On Sat, 11 Sept 2021 at 05:12, Aditya Mahajan via nt= g-context <ntg-context@ntg.nl&= gt; wrote:

I som= etimes define lua functions for showing out worked out calculations. The fo= llowing minimal example shows that

=C2=A0 context([[\startformula ... \stopformula]])

fails in LMTX with an error message:

tex error=C2=A0 =C2=A0 =C2=A0 =C2=A0> tex error on line 3 in file ./test= .tex: Undefined control sequence \undefined

MWE:

\startluacode
=C2=A0 thirddata =3D thirddata or {}

=C2=A0 local comment =3D [[
=C2=A0 =C2=A0 This is a famous formula
=C2=A0 =C2=A0 \startformula
=C2=A0 =C2=A0 =C2=A0 a^2 + b^2 =3D c^2
=C2=A0 =C2=A0 \stopformula
=C2=A0 ]]

=C2=A0 function thirddata.explanation()
=C2=A0 =C2=A0 =C2=A0 context(comment)
=C2=A0 end

\stopluacode

\starttext
\ctxlua{thirddata.explanation()}
\stoptext

The actual use case is more complicated (where I use templates, so I don= 9;t want to convert everything to context.startformula() etc.). The example= compiles with MkIV but not LMTX.

Any idea what is going on?

Thanks,
Aditya

___________________________________________________________________________= ________
If your question is of interest to others as well, please add an entry to t= he Wiki!

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