bug#21143: 24.5; M-x octave-mode fails with: Cannot open load file: no such file or directory, octave-mod

bug#21143: 24.5; M-x octave-mode fails with: Cannot open load file: no such file or directory, octave-mod

[Alex Ryan]

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Do this:
M-x octave mode

Observe this error message:
Cannot open load file: no such file or directory, octave-mod

Author says these files should be installed:
https://www.gnu.org/software/octave/doc/interpreter/Installing-EOS.html#Installing-EOS

But they are not.

Looks like the file got renamed.

Here's how I fixed it:

$cd /usr/local/Cellar/emacs/24.5/share/emacs/24.5/lisp/progmodes
$mv octave.el.gz octave-mod.el.gz
$mv octave.elc octave-mod.elc

I didn't see the authors other 2 files in distribution though.
octave-inf.el, octave-hlp.el

C-h a mode
...
519 octave-mode                   M-x ... RET
520    (not documented)




In GNU Emacs 24.5.1 (x86_64-apple-darwin14.3.0, NS apple-appkit-1347.57)
 of 2015-05-19 on Alexs-MacBook-Pro-2.local
Configured using:
 `configure --prefix=/usr/local/Cellar/emacs/24.5
 --enable-locallisppath=/usr/local/share/emacs/site-lisp
 --infodir=/usr/local/Cellar/emacs/24.5/share/info/emacs --without-dbus
 --without-gnutls --with-ns --disable-ns-self-contained'

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

Major mode: Octave

Minor modes in effect:
  global-linum-mode: t
  linum-mode: t
  tooltip-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
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
File mode specification error: (file-error "Cannot open load file" "no such
file or directory" "octave-mod")
End of buffer [2 times]
Auto-saving...
command-execute: Cannot open load file: no such file or directory,
octave-mod
Type C-x 4 C-o RET to restore the other window.
Mark saved where search started
Type "q" to restore previous buffer, M-x scroll-up to scroll help.
Making completion list... [2 times]
command-execute: Cannot open load file: no such file or directory,
octave-mod
Auto-saving...done

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mail-utils octave smie comint ansi-color ring pp help-fns
misearch multi-isearch apropos help-mode easymenu xterm time-date linum
tooltip electric uniquify ediff-hook vc-hooks lisp-float-type mwheel
ns-win tool-bar dnd fontset image regexp-opt fringe tabulated-list
newcomment lisp-mode prog-mode register page menu-bar rfn-eshadow timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai
tai-viet lao korean japanese hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help
simple abbrev minibuffer 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 make-network-process
cocoa ns multi-tty emacs)

Memory information:
((conses 16 97306 5730)
 (symbols 48 18153 0)
 (miscs 40 482 228)
 (strings 32 12463 4587)
 (string-bytes 1 335911)
 (vectors 16 8319)
 (vector-slots 8 347347 22744)
 (floats 8 63 697)
 (intervals 56 4453 57)
 (buffers 960 17))

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bug#21143: 24.5; M-x octave-mode fails with: Cannot open load file: no such file or directory, octave-mod

[Glenn Morris]

Alex Ryan wrote:

> Do this:
> M-x octave mode
>
> Observe this error message:
> Cannot open load file: no such file or directory, octave-mod
>
> Author says these files should be installed:
> https://www.gnu.org/software/octave/doc/interpreter/Installing-EOS.html#Installing-EOS
>
> But they are not.

GNU Emacs has included Octave mode since Emacs 21.
Therefore there is no need to do anything like

  (autoload 'octave-mode "octave-mod" nil t)

in any non-ancient version of Emacs. If you have such a statement
anywhere in your ~/.emacs file (for example), it will lead to an error
in Emacs 24.4, where "octave-mode.el" has been renamed to "octave.el".
Just remove that statement.

The instructions on the Octave website are outdated, but nobody here can
do anything about that. Please report it to the Octave maintainers.
Thanks.