pdflatex with simple Feynman

[Herbert Voss]

Am 12.12.22 um 13:36 schrieb Haines Brown:
> I have no trouble witn Feynman diagrams in a LuaLaTeX document, but
> find it difficult to construct one in a LaTeX document. I construct a
> c.tex file with the sample from the fmf manual:
>
>    \documentclass[12pt]{article}
>    \usepackage[utf8]{inputenc}

utf8 is  for years the default ...



>    \usepackage[T1]{fontenc}
>    \usepackage{feynmp-auto}
>    \begin{document}
>      \begin{fmffile}
>   

should be

\begin{fmffile}{test}


>     \begin{fmfgraph*}(40,30)
>        \fmfpen{thick}
>        \fmfleft{i1,i2}
>        \fmfright{o1,o2}
>        \fmf{fermion}{i1,v1,o1}
>        \fmf{fermion}{i2,v2,o2}
>        \fmf{photon,label=$q$}{v1,v2}
>        \fmfdot{v1,v2}
>      \end{fmfgraph*}
>      \end{fmfile}

\end{fmffile}

then it works for me with pdflatex

Herbert

>    \end{document}
>
> When I do $ pdflatex c.tex I get error:
>
>    ...
>    [Loading MPS to PDF converter (version 2006.09.02).] )
>    (/usr/local/texlive/2022/texmf-dist/tex/latex/epstopdf-pkg/epstopdf-base.sty
>    (/usr/local/texlive/2022/texmf-dist/tex/latex/latexconfig/epstopdf-sys.cfg))
>    ! Argument of \begin  has an extra }.
>
> If from a command prompt before running pdflatex I do:
>
>    $ fm \mode=localfile;' input c.tex
>
> in the result c.log I get
>
>    ! Forbidden token found while scanning to the end of the statement.
>    <inserted text>
>                  ;
>    <to be read again>
>                     end
>    l.11 \end
>           {fmfgraph*}
>    A previous error seems to have propagated,
>    causing me to read past where you wanted me to stop.
>    I'll try to recover; but if the error is serious,
>    you'd better type `E' or `X' now and fix your file.
>
>