'n' doesn't work when using ediff -- an ediff beginners's quesstion

'n' doesn't work when using ediff -- an ediff beginners's quesstion

[Hendrik Boom]

This has got to be an utter beginners' question.  I've been using emacs 
for years, bot not ediff, and I must be doing something wrong with ediff.

ediff is started from monotone, my revision management system when its 
automatic merge mechanisms are not sufficient.  I gather this kind of 
thing is the principal use for ediff.

I'm running everything through a terminal emulator running ssh between 
two Debian Linux systems.  I get a text-mode XEmacs.

It has five panels -- and A and B for the files to be merged, a C for the 
merged file, an Ediff control panel (containing the line "Type ? for 
help", and the usual single-line command-entry line at the bottom (the 
place where ctl X ctl F would expect to be given a file name.

When the Ediff control panel is the current buffer, I type 'n' and get 
the message (in that bottom  line):

  No such coding system: emacs-internal

By the way, space gives me the same message.  'p' and 'P' both tell me 
"At beginning of the difference list", which is reasonable, and 'v' and 
'V' both scroll as expected, in opposite directions.

What could I possibly be doing wrong?

- hendrik

Re: 'n' doesn't work when using ediff -- an ediff beginners's quesstion

[Stefan Monnier]

> I'm running everything through a terminal emulator running ssh between 
> two Debian Linux systems.  I get a text-mode XEmacs.

Do you really mean XEmacs, here?

>   No such coding system: emacs-internal

Maybe it's a bug in XEmacs's version of ediff or an incompatibility
between the version of ediff and the version of XEmacs: emacs-internal
is a coding-system introduced around Emacs-23.  I'm not sure whether
XEmacs has it as well.

Since this is an Emacs newsgroup, my recommendation would be to try and
use Emacs instead of XEmacs.  Otherwise, maybe the comp.emacs.xemacs
newsgroup will be able to help you better.


        Stefan

Re: 'n' doesn't work when using ediff -- an ediff beginners's quesstion

[Dan Espen]

Hendrik Boom <hendrik@topoi.pooq.com> writes:

> This has got to be an utter beginners' question.  I've been using emacs 
> for years, bot not ediff, and I must be doing something wrong with ediff.
>
> ediff is started from monotone, my revision management system when its 
> automatic merge mechanisms are not sufficient.  I gather this kind of 
> thing is the principal use for ediff.
>
> I'm running everything through a terminal emulator running ssh between 
> two Debian Linux systems.  I get a text-mode XEmacs.

This doesn't make sense.
I can't imagine Ediff in a text mode terminal...

> It has five panels -- and A and B for the files to be merged, a C for the 

especially, if you see 5 panels.

> merged file, an Ediff control panel (containing the line "Type ? for 
> help", and the usual single-line command-entry line at the bottom (the 
> place where ctl X ctl F would expect to be given a file name.
>
> When the Ediff control panel is the current buffer, I type 'n' and get 
> the message (in that bottom  line):
>
>   No such coding system: emacs-internal

Search for this message using Google.

This is emacs help, not XEmacs.

-- 
Dan Espen

Re: 'n' doesn't work when using ediff -- an ediff beginners's quesstion

[Eli Zaretskii]

> From: Dan Espen <despen@verizon.net>
> Date: Mon, 28 Jan 2013 22:13:23 -0500
> 
> Hendrik Boom <hendrik@topoi.pooq.com> writes:
> 
> > This has got to be an utter beginners' question.  I've been using emacs 
> > for years, bot not ediff, and I must be doing something wrong with ediff.
> >
> > ediff is started from monotone, my revision management system when its 
> > automatic merge mechanisms are not sufficient.  I gather this kind of 
> > thing is the principal use for ediff.
> >
> > I'm running everything through a terminal emulator running ssh between 
> > two Debian Linux systems.  I get a text-mode XEmacs.
> 
> This doesn't make sense.
> I can't imagine Ediff in a text mode terminal...

Well, you can always try, you know.  Scoop: it does work.

> > It has five panels -- and A and B for the files to be merged, a C for the 
> 
> especially, if you see 5 panels.

Each one is a window on the same frame, when Emacs runs on a text
terminal.  Nothing impossible with that, is there?

Anyway, the problem has nothing to do with the kind of terminal on
which Ediff runs, so all this is not relevant.