I am getting some puzzling errors when I try to use the Greek fonts
in math formulae (to represent Greek numerals as written in mss.)
In a short file, both
\overbar{\grk{kj}} and
$\overline{\hbox{\grk{kj}}}$
work as expected, even when they occur in Greek text.
But in a long, complicated file with lots of Greek etc. and the same
environment file, I get
! Math formula deleted: Insufficient symbol fonts.
\stopmathmode ->$
\dodounderbar ...nderbar {-\dimen 0}{\dimen 2}{#1}
\egroup
\processisolatedwords ...dwordsfalse #2{\unhbox 0}
\else
\isolatedwordstrue \...
\redounderbar ...sisolatedwords {#2}\dodounderbar
\egroup
l.1 ...-n'o\-menoc