質問に対するお答えが遅くなってすいません。

% --- re49541.tex ----------------------------------------
\documentclass{jarticle}
\usepackage[dvips]{emathPh}
\listfiles
\begin{document}
\begin{zahyou}[ul=10mm](-3,3)(-3,3)
        \tenretu{A(-2,-2)w;B(2,1)e}
        \HenKo\A\B{$a$}
        \Drawline{\A\B}
\end{zahyou}
\end{document}

を実行した場合、次のようなエラーが出ました。

This is pTeX, Version p2.1.8, based on TeX, Version 3.14159 (SJIS) (Web2C 7.2) (format=platex 1998.10.16)  22 SEP 2007 22:13
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LaTeX Info: Redefining \dots on input line 335.
LaTeX Info: Redefining \ldots on input line 418.
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Package: emathC 2003/03/30 v0.08

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Package: trig 1994/10/16 v1.08 sin cos tan (DPC)
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Package color Info: Driver file: dvips.def on input line 131.

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No file えらー.aux.
\openout1 = `えらー.aux'.

LaTeX Font Info:    Checking defaults for OML/cmm/m/it on input line 5.
LaTeX Font Info:    ... okay on input line 5.
LaTeX Font Info:    Checking defaults for T1/cmr/m/n on input line 5.
LaTeX Font Info:    ... okay on input line 5.
LaTeX Font Info:    Checking defaults for OT1/cmr/m/n on input line 5.
LaTeX Font Info:    ... okay on input line 5.
LaTeX Font Info:    Checking defaults for OMS/cmsy/m/n on input line 5.
LaTeX Font Info:    ... okay on input line 5.
LaTeX Font Info:    Checking defaults for OMX/cmex/m/n on input line 5.
LaTeX Font Info:    ... okay on input line 5.
LaTeX Font Info:    Checking defaults for U/cmr/m/n on input line 5.
LaTeX Font Info:    ... okay on input line 5.
LaTeX Font Info:    Checking defaults for JY1/mc/m/n on input line 5.
LaTeX Font Info:    ... okay on input line 5.
LaTeX Font Info:    Checking defaults for JT1/mc/m/n on input line 5.
LaTeX Font Info:    ... okay on input line 5.
! Undefined control sequence.
l.8         \HenKo
           \A\B{$a$}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

LaTeX Font Info:    Try loading font information for U+msa on input line 8.
(c:/ptex/texmf/tex/latex/amsfonts/umsa.fd
File: Umsa.fd 1995/01/05 v2.2e AMS font definitions
)
LaTeX Font Info:    Try loading font information for U+msb on input line 8.

(c:/ptex/texmf/tex/latex/amsfonts/umsb.fd
File: Umsb.fd 1995/01/05 v2.2e AMS font definitions
) [1

] (えらー.aux)

 *File List*
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   jy1mc.fd    1997/01/24 v1.3 KANJI font defines
   jy1gt.fd    1997/01/24 v1.3 KANJI font defines
   jt1mc.fd    1997/01/24 v1.3 KANJI font defines
   jt1gt.fd    1997/01/24 v1.3 KANJI font defines
 kinsoku.tex
 plpatch.ltx
jarticle.cls    1998/12/24 v1.1o Standard pLaTeX class
 jsize10.clo    1998/12/24 v1.1o Standard pLaTeX file (size option)
 emathPh.sty    2003/03/30 v 1.32
    epic.sty    
   eepic.sty    
eclarith.sty    
   emath.sty    2003/03/22 v0.84 初等数学マクロパッケージ
 emath2e.sty
  ifthen.sty    1997/11/02 v1.0n Standard LaTeX ifthen package (DPC)
 amsmath.sty    1997/03/20 v1.2d AMS math features
 amstext.sty    1996/10/28 v1.2b
  amsgen.sty    
  amsbsy.sty    1996/10/28 v1.2b
  amsopn.sty    1996/10/28 v1.2b operator names
 amssymb.sty    1996/11/03 v2.2b
amsfonts.sty    1996/11/03 v2.2c
  emathC.sty    2003/03/30 v0.08
    calc.sty    1998/07/07 v4.1b Infix arithmetic (KKT,FJ)
  emathE.sty    2003/02/14 v0.48 拡張enumerate
enumerate.sty    1994/01/31 v2.02 enumerate extensions (DPC)
  keyval.sty    1998/06/05 v1.11 key=value parser (DPC)
graphicx.sty    1997/06/09 v1.0d Enhanced LaTeX Graphics (DPC,SPQR)
graphics.sty    1998/05/27 v1.0h Standard LaTeX Graphics (DPC,SPQR)
    trig.sty    1994/10/16 v1.08 sin cos tan (DPC)
graphics.cfg
   dvips.def    1998/05/03 v3.0f Driver-dependant file (DPC,SPQR)
   color.sty    1998/05/27 v1.0g Standard LaTeX Color (DPC)
   color.cfg
dvipsnam.def    1998/05/03 v3.0f Driver-dependant file (DPC,SPQR)
    umsa.fd
    umsb.fd
 ***********

 ) 
Here is how much of TeX's memory you used:
 4493 strings out of 10661
 43652 string characters out of 69663
 133355 words of memory out of 263001
 7598 multiletter control sequences out of 10000+0
 9218 words of font info for 39 fonts, out of 200000 for 1000
 14 hyphenation exceptions out of 1000
 47i,9n,65p,252b,525s stack positions out of 300i,100n,500p,30000b,4000s

Output written on えらー.dvi (1 page, 1136 bytes).

▼関連発言
│
└◆6457:\Henkoが■で表示される [ひさを] 09/21 18:30
　└◆6458:Re:\Henkoが■で表示される [tDB] 09/22 08:03
　　└◆6460:Re[2]:\Henkoが■で表示される [ひさを] 09/22 11:14
　　　└◆6461:Re[3]:\Henkoが■で表示される [tDB] 09/22 11:27
　　　　└◆6463:Re[4]:\Henkoが■で表示される [ひさを] 09/22 12:21
　　　　　└◆6464:Re[5]:\Henkoが■で表示される [tDB] 09/22 12:55
　　　　　　└◆6466:Re[6]:\Henkoが■で表示される [ひさを] 09/22 13:54
　　　　　　　└◆6467:Re[7]:\Henkoが■で表示される [tDB] 09/22 15:20
　　　　　　　　└◆6468:結果です [ひさを] 09/22 16:56
　　　　　　　　　└◆6470:Re:結果です [tDB] 09/22 19:20
　　　　　　　　　　└◆6471:Re[2]:結果です [ひさを] 09/22 22:13
　　　　　　　　　　　└◆6472:Re[3]:結果です [tDB] 09/23 08:25
　　　　　　　　　　　　└◆6473:Re[4]:結果です [ひさを] 09/23 19:46<-last