bug#24824: 26.0.50; error in process filter: Symbol’s function definition is void: mm-decode-coding-region

[bugs@gnu.support (Jean Louis)]

Since I installed last w3 version 4.0.49, I am getting this problem:

error in process filter: Symbol’s function definition is void: mm-decode-coding-region                  


In GNU Emacs 26.0.50.9 (x86_64-unknown-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2016-10-29 built on protected.rcdrun.com
Repository revision: 966b73b3163416adf09bcff7418ecc9fa5a554c9
Windowing system distributor 'The X.Org Foundation', version 11.0.11801000
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Making completion list...

Configured using:
 'configure --prefix=/usr --localstatedir=/var --with-sound=alsa
 --with-modules --with-x --with-x-toolkit=lucid --without-dbus
 --without-gconf --without-gsettings'

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM NOTIFY ACL
LIBSELINUX GNUTLS LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS LUCID
X11 MODULES

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message subr-x puny seq byte-opt gv
bytecomp byte-compile cl-extra help-mode cconv cl-loaddefs pcase cl-lib
dired dired-loaddefs format-spec rfc822 mml easymenu mml-sec
password-cache epa derived epg epg-config gnus-util rmail rmail-loaddefs
mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils
mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr
mail-utils time-date mule-util tooltip eldoc electric uniquify
ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list newcomment elisp-mode lisp-mode prog-mode register page
menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core term/tty-colors frame cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese charscript case-table epa-hook
jka-cmpr-hook help simple abbrev obarray minibuffer cl-preloaded nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote inotify dynamic-setting
font-render-setting x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 96594 7501)
 (symbols 48 20379 0)
 (miscs 40 44 108)
 (strings 32 18312 4194)
 (string-bytes 1 572931)
 (vectors 16 13475)
 (vector-slots 8 449533 4104)
 (floats 8 185 34)
 (intervals 56 246 0)
 (buffers 976 13)
 (heap 1024 16877 764))