<div dir="ltr"><div><div>Hi,<br></div>I tried to compile :<br><br>

<p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">\documentclass[a4paper,10pt]{article}</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">\usepackage{luamplib}</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">\begin{document}</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace"><br></span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">A%</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">\begin{mplibcode}</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">beginfig(1);</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">fill fullcircle scaled 20;</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">endfig;</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">\end{mplibcode}</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">B\par </span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace"><br></span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">\end{document}</span></p><p style="margin:0px;text-indent:0px"><br></p><p style="margin:0px;text-indent:0px">but I get :</p><p style="margin:0px;text-indent:0px">
<br></p><p style="margin:0px;text-indent:0px">

</p><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">Module luamplib info: This is MetaPost, Version 1.803</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)            </span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)            </span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)            </span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)            ! I can't open file `<a href="http://plain.mp">plain.mp</a>'.</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)            <*>         input <a href="http://plain.mp">plain.mp</a></span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)                                       ;</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)            Please type another input file name</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)            ! Emergency stop.</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)            <*>         input <a href="http://plain.mp">plain.mp</a></span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)                                       ;</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)            </span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">(luamplib)            </span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">! LuaTeX error ...texlive/2011/texmf-dist/tex/luatex/luamplib/luamplib.lua:327: </span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">Module luamplib error: unknown, no error, terminal or log messages</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace"><br></span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">stack traceback:</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">     [C]: in function 'error'</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">     ...xlive/2011/texmf-dist/tex/luatex/luatexbase/modutils.lua:26: in function 'mo</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">dule_error_int'</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">     ...xlive/2011/texmf-dist/tex/luatex/luatexbase/modutils.lua:49: in function 'er</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">r'</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">     ...texlive/2011/texmf-dist/tex/luatex/luamplib/luamplib.lua:327: in function 'r</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">eporterror'</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">     ...texlive/2011/texmf-dist/tex/luatex/luamplib/luamplib.lua:299: in function 'l</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">oad'</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">     ...texlive/2011/texmf-dist/tex/luatex/luamplib/luamplib.lua:661: in function 'm</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">akeTEXboxes'</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">     [string "\directlua "]:1: in main chunk.</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">\ltxdomplibcodeindeed ...([===[\reserved@a ]===])}</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">                                                  \directlua {luamplib.proce...</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><span style="font-family:courier new,monospace">l.10 \end{mplibcode}</span></p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px">                  </p><span style="font-family:courier new,monospace">
</span><p style="margin:0px;text-indent:0px"><br></p>
I didn't find anything on the web.<br></div>Can you help me ? Thanks<br><div><div><p style="margin:0px;text-indent:0px"><br></p><p style="margin:0px;text-indent:0px"><br></p><br><div><br></div></div></div></div>