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<font face="Times New Roman">(Sorry, I don't know how to respond to
an email when using the digest mode, so I'm sending a response
this way.)<br>
<br>
I have gotten this message with XeLaTeX on both Windows and Linux
when TeX is trying to hyphenate a word that has a character not in
the normal set of characters for the language of the document.<br>
<br>
For example, the document is written in Spanish and is set to use
the Spanish hyphenation rules. There is a word in the prose being
processed that has a saltillo character in it (U+A78C). My guess
is that when TeX tries to hyphenate this word, hyphenation fails
and the result is this emergency stop message. If one either adds
a hyphenation exception for this word (via adding it to the list
in \hyphenation{}) or if one encloses it within an \mbox{}, then
one does not get the emergency stop.<br>
<br>
For some reason, this does not seem to happen on MacOS X.<br>
<br>
--Andy Black<br>
<br>
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