One word, six letters: GOOGLE. A search on "ReadFile end-of-file
errno = 109" turns up a couple of starting points:

http://www.mers.com/IB_0327.HTML

and

http://216.239.33.100/search?
q=cache:FuJ4Qb3ZQagC:mers.com/pipermail/ib_general/2000-
June/001065.html+%22ReadFile+end-of-file+errno+%3D+109%
22&hl=en&ie=UTF-8

Watch the line wrap! That one above is a 'cached' link -- the
original page had disappeared. Google's cached pages are brilliant.
Many a time a page has died but been retained in Google's db, God
bless em. I especially like it when MS force a site to pull down a
page, but it remains available in the Google cache for ages.

Okay, I'll even save you the trouble of visiting that link, because
this quote may solve your problem immediately:

"I'm embarrassed. The problem was that a remote machine was trying
to talk to the server over NetBeui, not TCP/IP. I found this on the
Interbase site. I apologize for the waste of bandwidth." -- Art Metz

Regards,
Andrew Ferguson

--- In ib-support@y..., "mk_delphi" <mk_delphi@y...> wrote:
> Hi Friends,
> In my log I have full of 10054 error, and this is
> not a problem, but what is then errno 109????
> Thx
>
> MATIASRV (Server) Fri Sep 20 13:03:11 2002
> INET/inet_error: read errno = 10054
>
> MATIASRV (Server) Fri Sep 20 16:30:13 2002
> WNET/wnet_error: ReadFile end-of-file errno = 109
>
> MATIASRV (Server) Sat Sep 21 07:16:55 2002
> INET/inet_error: read errno = 10054
>
> Sincerely yours,
> Marco