Subject: Re: bug#26310: 25.1; Emacsclient to emacs --daemon frame/connection error

From: [email-masked]
Date: Thu, 30 Mar 2017 21:26:23 -0400

Live System User <[email-masked]> writes:

>     What is the cause of the "stringp" error and why doesn't
>     "debug-on-error" give further diagnostics on its cause?
>     The " *server*" buffer logging information appears to show
>     the correct passing of the protocol parameters so what is
>     the argument(s) that the Emacs server belives is nil or
>     missing?

The error happens inside a condition-case, so the debugger is not
invoked.  Can you try setting debug-on-signal?