Re: PSGML broken?

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sun, 15 Jan 2023 11:24:30 +0100
> From: Ulrich Deiters <ulrich.deiters@uni-koeln.de>
> 
> > So I think what you should do is:
> > 
> >   . start Emacs
> >   . type "M-x load-library RET psgml RET
> > 
> > Then try visiting your XML files and see if things work better now.
> 
> This succeeds with the system-wide installed Emacs-27.2, not
> with Emacs-28.2, which is still in the installation directory
> (it reports psgml as installed, but cannot find the library).

So your installation of PSGML seems to be broken.  How did you install
it, and how was that installation different from what you had with
Emacs 25?

> Using the Emacs-27.2:
> I visited one of my XML files, and, for the first time, I got
> the correct SGML menu in the menu bar. So there is some progress.

Of course!  You are finally using PSGML, not another mode which just
happens to have the same name...

> However, when I try to use this menu to load a DTD or to
> insert a tag attribute, all I get is the error message
> "Symbol's value as variable is void:
> default-enable-multibyte-characters"
> What should I do to get rid of this error message?

I don't know.  This message doesn't come from PSGML, assuming you have
the latest version 1.3.5 of PSGML.  Or are you using an older version?

> > (These two lines are from the PSGML manual, which comes with the
> > package; did you read it?)
> 
> I saw these lines elsewhere. But where is the PSGML manual?
> It is not included in the distribution, and the link on the
> GNU page (to lysator.se) is broken.

In the tarball for PSGML 1.3.5 I see the file psgml.texi that is the
manual.  The installation with package.el is supposed to produce the
Info manual from it, but you can also read the Texinfo sources
directly.

Are you using the latest version of PSGML?  If not, please do.  Also,
I recommend installing from ELPA with package.el.