\documentclass{jsarticle}
% \documentclass{jarticle}
\usepackage{graphicx}
\usepackage[remake]{emathPs}
\usepackage{emathPsb}
\begin{document}
\begin{EMpsrectbox}
a
\end{EMpsrectbox}
\end{document}

上記をタイプセットするとエラーになります。
jsarticleをjarticleにするとうまく通ります。
jsarticleでうまく通す方法はないでしょうか？

This is pTeX, Version 3.1415926-p3.1.11 (sjis) (Web2C 2009) (format=platex 2010.1.2)  27 APR 2010 00:41
 \write18 enabled.
 Source specials enabled.
 %&-line parsing enabled.
**q.tex
(./q.tex
pLaTeX2e <2006/11/10>+0 (based on LaTeX2e <2009/09/24> patch level 0)
Babel <v3.8l> and hyphenation patterns for english, usenglishmax, ukenglish, ba
sque, bulgarian, coptic, welsh, czech, slovak, german, ngerman, danish, esperan
to, spanish, catalan, galician, estonian, farsi, finnish, french, irish, greek,
 monogreek, ancientgreek, croatian, hungarian, interlingua, ibycus, bahasa, ice
landic, italian, latin, mongolian, dutch, norsk, polish, portuguese, pinyin, ro
manian, russian, slovenian, samin, uppersorbian, serbian, swedish, turkish, ukr
ainian, dumylang, nohyphenation, loaded.

(c:/usr/local/W32TeX/share/texmf-local/tex/platex/jsclasses-100314/jsarticle.cl
s
Document Class: jsarticle 2010/03/14 okumura
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\abovecaptionskip=\skip41
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\@lnumwidth=\dimen119
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\heisei=\count89
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Package: graphicx 1999/02/16 v1.0f Enhanced LaTeX Graphics (DPC,SPQR)

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Package graphics Info: Driver file: dviout.def on input line 91.

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Package: emathPs 2010/03/16 v 1.76

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Package: verbatim 2003/08/22 v1.5q LaTeX2e package for verbatim enhancements
\every@verbatim=\toks16
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Package: emathPxy 2009/07/18 v 0.48

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Package: emathPh 2010/02/05 v 3.80

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Package: emath 2010/03/13 v2.21 初等数学マクロパッケージ

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Package: amsmath 2000/07/18 v2.13 AMS math features
\@mathmargin=\skip43

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Package: amsopn 1999/12/14 v2.01 operator names
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)
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Package: amssymb 2009/06/22 v3.00

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Package: amsfonts 2009/06/22 v3.00 Basic AMSFonts support
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\symAMSb=\mathgroup6
LaTeX Font Info:    Overwriting math alphabet `\mathfrak' in version `bold'
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))
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Package: emathC 2010/02/22 v0.72

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\calc@Ccount=\count104
\calc@Cskip=\skip48
)
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Package: ifthen 2001/05/26 v1.1c Standard LaTeX ifthen package (DPC)
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Package: emathE 2010/03/21 v1.06 拡張enumerate

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Package: emathEc 2010/03/21 v0.10

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Package: enumerate 1999/03/05 v3.00 enumerate extensions (DPC)
\@enLab=\toks24
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Package: jquote 2009/10/21 v0.11
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\yunitlength=\dimen143
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Package: emathPp 2010/02/06 v 0.85

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Package: lastpage 1994/06/25 v0.1b LaTeX2e package for refs to last page number
 (JPG)
)
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(c:/usr/local/W32TeX/share/texmf-local/tex/platex/emath/emathPsb.sty
Package: emathPsb 2010/03/07 v 0.11β
\rectb@x=\box49
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\ps@box=\box50
) (./q.aux)
\openout1 = `q.aux'.

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LaTeX Font Info:    ... okay on input line 6.
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LaTeX Font Info:    ... okay on input line 6.
LaTeX Font Info:    Checking defaults for JT1/mc/m/n on input line 6.
LaTeX Font Info:    ... okay on input line 6.
File: ./q1.eps Graphic file (type eps)
<./q1.eps>
\openout4 = `./q1.eps'.


! Missing number, treated as zero.
<to be read again> 
                   <
l.9 \end{EMpsrectbox}
                     
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

! Missing number, treated as zero.
<to be read again> 
                   \relax 
l.9 \end{EMpsrectbox}
                     
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

AED: lastpage setting LastPage [1

] (./q.aux) ) 
Here is how much of TeX's memory you used:
 8208 strings out of 494369
 82899 string characters out of 3170658
 281866 words of memory out of 1500000
 11525 multiletter control sequences out of 15000+200000
 10255 words of font info for 46 fonts, out of 2000000 for 2000
 683 hyphenation exceptions out of 8191
 66i,8n,40p,335b,928s stack positions out of 3000i,500n,5000p,500000b,5000s

Output written on q.dvi (1 page, 320 bytes).

▼関連発言
│
└◆8800:jsarticleとEMpsrectbox [Kay] 04/27 00:46
　└◆8801:Re:jsarticleとEMpsrectbox [tDB] 04/27 07:58
　　└◆8802:Re[2]:jsarticleとEMpsrectbox [Kay] 04/27 10:51<-last