ispell.el to use aspell

[Luis O. Silva]

Dear Emacs Community,

In my system (GNU/Linux, Emacs 21.1.1) the only spell-checker
is aspell. The package come with a script which allows to use
this program as if it were ispell. When spelling-checking a
large tex file I had always the well known "misalignment"
problem. But recently I was told that the latest version of
ispell.el solves this problem. Thus, I upgraded my ispell.el
to version 3.6, but without success. Emacs just freezes when
trying to spelling check a large tex file. After reading the
headers of ispell.el I came to the conclusion that I must
indicate emacs that the checker is aspell, but I was unable to
find the correct variable to set. Thank you very much for any
help.

Regards,
luis

-- 
Luis Octavio Silva P.
St. Petersburg State University.
66/3 Botanicheskaya St., Apt.119/2
Stary Peterhof
St. Petersburg, Russia.