[h-e-w] xargs fails with "grep: Invalid argument"

[egarrulo]

Hello,

when issuing `rgrep' on directories with a lot of files and
subdirectories, I get the following error in "*grep*" buffer:

xargs: grep: Invalid argument

I'm using GnuWin32's `find', 'grep' and `xargs'. I've checked that by issuing:

                   (locate-file "find" exec-path exec-suffixes)
                   (locate-file "grep" exec-path exec-suffixes)
                   (locate-file "xargs" exec-path exec-suffixes)

Below are versions of each software involved and full "*grep*" buffer.
Thanks for your help.

===

(emacs-version) => "GNU Emacs 23.1.1 (i386-mingw-nt5.1.2600)
of 2009-07-30 on SOFT-MJASON"

Windows XP SP3

===

GNU grep 2.5.4

GNU find version 4.2.20
Features enabled: CACHE_IDS D_TYPE

GNU xargs version 4.2.20

===

-*- mode: grep; default-directory: "~/common/emacs/lisp/site-lisp/" -*-
Grep started at Thu Jul 29 12:44:28

find . "(" -path "*/SCCS" -o -path "*/RCS" -o -path "*/CVS" -o -path
"*/MCVS" -o -path "*/.svn" -o -path "*/.git" -o -path "*/.hg" -o -path
"*/.bzr" -o -path "*/_MTN" -o -path "*/_darcs" -o -path "*/{arch}" ")"
-prune -o  -type f "(" -iname "*.el" ")" -print0 | xargs -0 -e grep
-nH -e "REDEFINED"
xargs: grep: Invalid argument

Grep finished (matches found) at Thu Jul 29 12:44:31