Thanks for the reply.

But I don't have customizations that require "lucid.el" in .emacs file.
Perhaps, some other elisp codes require this particular portion...
My emacs loads "lucid.el" indirectly, I guess.

soichi

2011/10/8 Eli Zaretskii <eliz@gnu.org>
> Date: Sat, 8 Oct 2011 15:56:31 +0900
> From: ishi soichi <soichi777@gmail.com>
>
> Recently my emacs produces an error (?) "Package lucid is obsolete!" when
> launched.
> I have no idea what it means...

Just what it says: the lucid.el package is obsolete.

Do you have some customizations on your .emacs file that load lucid?
If so, remove the command that loads lucid (something like '(load "lucid")'
or '(require 'lucid)'), and see if something stops working; it shouldn't.