すみません。ご指摘のようにHiraMinProです。
コンピュータはMacでOSは10.6.4です。
10.4では今の設定で大丈夫だったはずなのですが。
添付ファイルを参照していただいて何か教えていただければ思います。

### platex emath例.tex
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Style option: `fancybox' v1.3 <2000/09/19> (tvz)
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) (/usr/local/teTeX/share/texmf/ptex/platex/emath/itembbox.sty
(/usr/local/teTeX/share/texmf-local/tex/latex/graphics/keyval.sty))
(/usr/local/teTeX/share/texmf-local/tex/latex/tools/enumerate.sty)
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(/usr/local/teTeX/share/texmf/ptex/platex/emath/emath2e.sty
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(/usr/local/teTeX/share/texmf/ptex/platex/emath/emathLb.sty))
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(/usr/local/teTeX/share/texmf-local/tex/latex/graphics/dvipsnam.def))))
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(./emath箴^^8b.aux)
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LaTeX Font Warning: Size substitutions with differences
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 )
(see the transcript file for additional information)
Output written on emath箴^^8b.dvi (18 pages, 98596 bytes).
Transcript written on emath箴^^8b.log.
### dvipdfmx emath例.dvi
emath例.dvi -> emath例.pdf
[1][2][3
** WARNING ** Could not locate a virtual/physical font for TFM "rml".
** WARNING ** >> This font is mapped to a physical font "HiraMinPro-W3".
** WARNING ** >> Please check if kpathsea library can find this font: HiraMinPro-W3
** ERROR ** Cannot proceed without .vf or "physical" font for PDF output...

Output file removed.
### dvipdfmx error

▼関連発言
│
└◆9268:作動しません [K.H] 09/17 23:01
　└◆9271:Re:作動しません [tDB] 09/18 13:06
　　└◆9275:Re[2]:作動しません [K.H] 09/18 18:36
　　　└◆9276:Re[3]:作動しません [tDB] 09/18 18:44
　　　　└◆9277:Re[4]:作動しません [K.H] 09/19 00:27
　　　　　└◆9278:Re[5]:作動しません [tDB] 09/19 09:08<-last