Debugger entered--Lisp error: (void-function find-charset)
  find-charset(latin-iso8859-13)
  byte-code("..." [c find-charset latin-iso8859-13 make-charset "ISO8859-13 (Latin 7)" append emacs-version>= 21 4 (short-name "Latin-7" long-name "ISO8859-13 (Latin 7)") (registry "iso8859-13" dimension 1 columns 1 chars 96 final ?Y graphic 1 direction l2r) require cl load "cl-macs" nil t 64 127 modify-syntax-entry make-char "w" mapc #<compiled-function (c) "...(8)" [c modify-syntax-entry make-char latin-iso8859-13 "w"] 4> (168 170 175 184 186 191) 32 87 "_" 119 "."] 7)
  (load-internal "[internal]")
  load-internal("latin-euro-latin7" nil require nil binary)
  load("latin-euro-latin7" nil require nil)
  require(latin-euro-latin7)
  byte-code("..." [require latin-euro-latin7 latin-euro-latin8 latin-euro-latin9 latin-euro-latin10 provide latin-euro-standards] 2)
  (load-internal "[internal]")
  load-internal("latin-euro-standards" nil require nil binary)
  load("latin-euro-standards" nil require nil)
  require(latin-euro-standards)
  byte-code("..." [provide latin-unity-vars require latin-euro-standards] 2)
  (load-internal "[internal]")
  load-internal("latin-unity-vars" nil require nil binary)
  load("latin-unity-vars" nil require nil)
  require(latin-unity-vars)
  byte-code("..." [provide latin-unity require latin-unity-vars fboundp character-to-unicode char-to-ucs latin-unity-tables "latin-unity-utils" custom-declare-group nil "Handle equivalent ISO-8859 characters properly (identify them) on output." :group mule] 6)
  (load-internal "[internal]")
  load-internal("latin-unity" nil require nil binary)
  load("latin-unity" nil require nil)
  require(latin-unity)
  mm-xemacs-find-mime-charset-1(886 4743)
  mm-find-mime-charset-region(886 4743 (iso-8859-15 iso-2022-jp-2))
  mml-parse-1()
  mml-parse()
  mml-generate-mime()
  message-encode-message-body()
  message-send-mail(nil)
  message-send-via-mail(nil)
  message-send(nil)
  message-send-and-exit(nil)
  call-interactively(message-send-and-exit)
  (dispatch-event "[internal]")