Setting local variables in a file

[Ed Reingold]

The following used to work (in an old version of Emacs) at the end of
a LaTeX file:

   %%% Local variables: %%%
   %%% tex-command:"/export/home/reingold/calendar-book/third-edition/
doerrata" %%%
   %%% End: %%%

But now that I have switched to Emacs 23.3, those lines no longer have
the desired effect.
What am I doing wrong and how do I fix it?

Thanks!