Re: Finding last *Async Shell Command* buffer?

[Eli Zaretskii]

> Date: Fri, 26 Mar 2021 10:01:31 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: help-gnu-emacs@gnu.org
> 
> Please look here:
> https://lists.gnu.org/archive/html/help-gnu-emacs/2021-03/msg00250.html
> 
> As maybe you can help me figure out why I cannot invoke that function
> from a key like M-& -- as when I solve that, I will easily be able to
> switch to last buffer with a key.

Emacs told you what's wrong: "Wrong number of arguments".  What isn't
clear about that error message?