Problem wit mp-grph

Problem wit mp-grph

[Marc van Dongen]

Hi Hans,

I just installed mp-grph but there seems to be a
problem with it (and plain LaTeX). When I run it
on the appended input, I get the following error:

[snip]
Runaway definition?
save.showtext;save.beginfig;let.beginfig=begingraphictextfig;save.endfig ETC.
! Forbidden token found while scanning the definition of protectgraphicmacros.
<inserted text> 
                enddef
<to be read again> 
                   end
l.27   save end
                     ; let end      = relax ;

Any suggestions?

Regards,

Marc van Dongen
-- 
verbatimtex
\documentclass{article}
\usepackage{euler}
\begin{document}
etex;

defaultfont := "cmr12";
defaultscale := 12pt /fontsize defaultfont;
input mp-tool;
%prologues := 0;
prologues := 2;
input boxes;
input mp-grph;
graphictextformat := "latex" ;
graphictextdirective "\documentclass[]{article}

beginfig(1);
  graphictext "$e = m c^2$"
    scaled 10
    dashed evenly
    withdrawcolor .7blue
    withfillcolor .7white
    withpen pencircle scaled 2pt;
  ;
endfig;

end.