Problems with LaTeX ruby package

[Victor Munoz <vmunoz@macul.ciencias.uchile.cl>]

Hello. I seem to have lost the ability to write in Japanese :-(

I'm trying to LaTeX a file using the ruby package. Something like:

\documentclass[12pt]{article}
\usepackage[overlap,CJK]{ruby}
\begin{document}

\ruby{...}{...}

\end{document}

I load it in emacs, load the cjk-enc library, write it as cjk file, and then
LaTeX the cjk file. But compilation fails in the "\ruby" line:

! Undefined control sequence.
try@size@range ...extract@rangefontinfo font@info
                                                  <-*>@nil <@nnil
l.16 ...^?^^?�^^?252^^?}{^^?66^^?^^?^^?�^^?203^^?}
                                                  \ruby{^^?66^^?^^?^^?�^^?22...


I compiled the same file last month with no problem.
ruby.sty is now version 4.7.0 (17-Oct-2006), and probably something
happened, but I see the \ruby command is defined in ruby.sty. Anybody can
help?

Regards,

Victor