No such file or directory, popup

[pauline-galea]

Is it possible to get company-mode start completing after two characters, 
rather than
after three characters.

> Sent: Wednesday, May 26, 2021 at 3:10 AM
> From: "Philip Kaludercic" <philipk@posteo.net>
> To: pauline-galea@gmx.com
> Cc: "Help Gnu Emacs" <help-gnu-emacs@gnu.org>
> Subject: Re: No such file or directory, popup
>
> pauline-galea@gmx.com writes:
>
> >> > Emacs 28.0.50 complains with
> >> >
> >> > File is missing: Cannot open load file, No such file or directory, popup
> >>
> >> Popup is a third-party library[0], that other third-party packages use.
> >>
> >> It would seem you (manually?) installed a package that requires a
> >> dependency (popup) you do not provide. From your other message I guess
> >> it is auto-complete. Have you considered using company? AFAIK it is
> >> usually the preferred auto-completion framework nowadays.
> >
> > I would agree with your evaluation because it is first being called by 
> > auto-complete.
> > Was not aware of "company" as "auto-complete" was what I had been 
> > introduced to.
> >
> > Have checked and found that "company" is part of GNU ELPA.  I am trying to 
> > understand
> > an important here.  I have installed "Emacs 25" from my package  manager.  
> > Later I
> > installed Emacs 27.1 and am trying out the latest development version.
> >
> > One thing that I am finding confusing is what happens when you install an 
> > emacs
> > package, because it does not look as though, the setup will apply to the 
> > latest
> > development verison, even if I use the same init files.
>
> How did you install 25 and 27.1? It might be that they are using some
> configuration specific to your system that adds additional directories
> to load elisp from, that the development version is missing. Does
> anything change if you run
>
>          $ emacs --no-site-lisp
>
> with an older version?
>
> (Also, how did you install auto-complete? Via M-x package-install or
> your system package manager?)
>
> --
>       Philip K.
>