> I don't know why teTeX's latex is okay and texfamily's is not.

I found it.

In teTeX, format file are generated like this way.

	tex -ini -fmt=latex -progname=latex latex.ini
                                                  ^^^
It formats latex.ini instead of latex.ltx.  whole content in
latex.ini is here

% Thomas Esser, 1998. public domain.
\scrollmode
\input latex.ltx
\endinput

yes, inserting \scrollmode before logical timer bomb is the
solution. :-)

The shortest (I think) work around is insert \scrollmode
to latex.ltx like below.  '1 year old' error will never
stop installation although '\ifnum\count@>99' becomes true!


--- latex.ltx.orig      Fri Sep 14 21:39:30 2001
+++ latex.ltx   Fri Sep 14 21:39:16 2001
@@ -72,6 +72,7 @@
   \errmessage
   {LaTeX must be made using an initex with no format preloaded}
 \fi
+\scrollmode
 \catcode`\{=1
 \catcode`\}=2
 \catcode`\#=6

--
Naoto Shimazaki