emathをいつも使わさせていただいております。

図の描画をする際にコンパイルした際に次のように出ました。

This is GUI-Shell Version 1.39.1, Copyright(C) 1996-2000 by Yoshiki OTOBE.
All rights reserved.
GUI-Shell Message(command): platex.exe グラフ用紙.TEX

This is pTeX, Version p2.1.8, based on TeX, Version 3.14159 (SJIS) (Web2C 7.2)
(グラフ用紙.tex
pLaTeX2e <1998/09/01>+1 (based on LaTeX2e <1998/06/01> patch level 0)
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Document Class: jarticle 1998/04/07 v1.1m Standard pLaTeX class
(C:/ptex/texmf/tex/platex/base/jsize12.clo))
(C:/ptex/texmf/tex/latex/tools/enumerate.sty)
(C:/ptex/texmf/tex/latex/tools/tabularx.sty
(C:/ptex/texmf/tex/latex/tools/array.sty))
(C:/ptex/texmf/tex/latex/tools/hhline.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/itembbox.sty
(C:/ptex/texmf/tex/platex/base/ascmac.sty
(C:/ptex/texmf/tex/platex/base/tascmac.sty))
(C:/ptex/texmf/tex/latex/graphics/keyval.sty))
(C:/ptex/texmf/tex/platex/misc/emath/sty/showexample.sty
(C:/ptex/texmf/tex/latex/base/ifthen.sty)
(C:/ptex/texmf/tex/latex/tools/verbatim.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathC.sty
(C:/ptex/texmf/tex/latex/tools/calc.sty)))
(C:/ptex/texmf/tex/latex/base/makeidx.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathP.sty
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathPp.sty
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathPh.sty
(C:/ptex/texmf/tex/latex/eepic/epic.sty
Enhancements to Picture Environment. Version 1.2 - Released June 1, 1986
) (C:/ptex/texmf/tex/platex/misc/emath/sty/eepic.sty
Extension to Epic and LaTeX. Version 1.1b - Released Febrary 7, 1988
) (C:/ptex/texmf/tex/platex/misc/emath/sty/eclarith.sty
eclarith.sty 1.1 --- July 1, 1992
) (C:/ptex/texmf/tex/platex/misc/emath/sty/emath.sty
(C:/ptex/texmf/tex/platex/misc/emath/sty/emath2e.sty
(C:/ptex/texmf/tex/latex/amslatex/inputs/amsmath.sty
(C:/ptex/texmf/tex/latex/amslatex/inputs/amstext.sty
(C:/ptex/texmf/tex/latex/amslatex/inputs/amsgen.sty))
(C:/ptex/texmf/tex/latex/amslatex/inputs/amsbsy.sty)
(C:/ptex/texmf/tex/latex/amslatex/inputs/amsopn.sty))
(C:/ptex/texmf/tex/latex/amsfonts/amssymb.sty
(C:/ptex/texmf/tex/latex/amsfonts/amsfonts.sty))
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathE.sty
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathEc.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/jquote.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathK.sty))))
(C:/ptex/texmf/tex/latex/graphics/graphicx.sty
(C:/ptex/texmf/tex/latex/graphics/graphics.sty
(C:/ptex/texmf/tex/latex/graphics/trig.sty)
(C:/ptex/texmf/tex/latex/graphics/graphics.cfg)
(C:/ptex/texmf/tex/latex/graphics/dviout.def)))
(C:/ptex/texmf/tex/latex/graphics/color.sty
(C:/ptex/texmf/tex/latex/graphics/color.cfg)
(C:/ptex/texmf/tex/latex/graphics/dvipsnam.def))))
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathPxy.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathPk.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathT.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathPb.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathPg.sty))
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathOld.sty
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathEy.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathMw.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathLb.sty)
(C:/ptex/texmf/tex/platex/misc/emath/sty/emathCap.sty)) (グラフ用紙.aux)
(C:/ptex/texmf/tex/latex/amsfonts/umsa.fd)
(C:/ptex/texmf/tex/latex/amsfonts/umsb.fd)
Runaway text?
pa 243
! TeX capacity exceeded, sorry [main memory size=263001].
\@paspecial #1#2->\special {pa #1 
                                  #2}
l.70 \end{zahyou}}
                  }
No pages of output.
Transcript written on グラフ用紙.log.

main memoryをemath のsample.pdf の9.2 main memory size の記述通りに
やろうとしたところ。DOSの画面で ptex --ini platex.ltxとうっても
! I can't read ptex.pool; bad path?
となり先に進めません。
どうすればよいか教えてください。

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