次のようなエラーが出て，うまくコンパイルできません．
フォントの問題でしょうか？？
教えていただけると助かります．
---------------------------------------------
This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015) (preloaded format=latex)---------------------------------------------
restricted \write18 enabled.
entering extended mode
(./b2021-ch01.tex
LaTeX2e <2015/10/01> patch level 2
Babel <3.9m> and hyphenation patterns for 79 languages loaded.
(./spi-b2021.cls
LaTeX Warning: You have requested document class `spi-b2021',
but the document class provides `spi-b883'.
Document Class: spi-b883 1996/05/26 v1.3r Standard LaTeX document class
Warning: psfig.sty could be be found.
Warning: epsfsafe.tex could not be found.
epsfig.sty inputed...ok
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/epsfig.sty
LaTeX Warning: You have requested document class `spi-b2021',
but the document class provides `epsfig'.
Document Class: epsfig 1999/02/16 v1.7a (e)psfig emulation (SPQR)
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/graphicx.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/keyval.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/graphics.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/trig.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/latexconfig/graphics.cfg)
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/dvips.def))))
epsf.sty inputed...ok
(/usr/local/texlive/2015/texmf-dist/tex/generic/epsf/epsf.sty
This is `epsf.tex' v2.7.4 <14 February 2011>
) (/usr/local/texlive/2015/texmf-dist/tex/latex/rotating/rotating.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/ifthen.sty))
(/usr/local/texlive/2015/texmf-dist/tex/latex/amsfonts/amsfonts.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/amsfonts/amssymb.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/amsmath/amsmath.sty
For additional information on amsmath, use the `?' option.
(/usr/local/texlive/2015/texmf-dist/tex/latex/amsmath/amstext.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/amsmath/amsgen.sty))
(/usr/local/texlive/2015/texmf-dist/tex/latex/amsmath/amsbsy.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/amsmath/amsopn.sty))
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/color.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/latexconfig/color.cfg)
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/dvipsnam.def))
(/usr/local/texlive/2015/texmf-dist/tex/latex/lastpage/lastpage.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/alltt.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/tools/array.sty) (./mathrsfs.sty)
(./mathtimy.sty (/usr/local/texlive/2015/texmf-dist/tex/latex/base/fontenc.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/ly1/ly1enc.def)
(/usr/local/texlive/2015/texmf-dist/tex/latex/ly1/ly1ptm.fd)) (./mathtime.sty))
(./lineno.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/boxedminipage/boxedminipage.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/makeidx.sty)
(./ws-crop9x6.sty (./crop.sty
(/usr/local/texlive/2015/texmf-dist/tex/xelatex/xetexconfig/crop.cfg)))
(./fnpos.sty)) (./b2021-ch01.aux) (./my1mtt.fd)
No file MY2mtt.fd.
! LaTeX Error: This NFSS system isn't set up properly.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.3 \begin{document}
?