Re: (control u)(control c)

[Eli Zaretskii]

> Date: Fri, 19 Aug 2022 11:09:08 +0200
> From: Andreas Röhler <andreas.roehler@easy-emacs.de>
> 
> Hi,
> 
> have a command bound to
> 
>    (global-set-key [(control c)(d)] 'mycommand)
> 
> which I tried to rebind onto
> 
>    (global-set-key [(control u)(control c)(d)] 'mycommand)
> 
> Get
> 
> Debugger entered--Lisp error: (error "Key sequence C-u C-c d starts with 
> non-prefix key C-u")
> 
> 
> Any solution?

Yes, don't use C-u in the sequence.  C-u is the prefix argument, so if
you want to repurpose is (I don't recommend that), you'd need to
unbind it first.