From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric S Fraga <esflists@gmail.com>
Subject: Re: org-koma-letter-template: Wrong type argument: char-or-string-p,
 nil
Date: Fri, 08 Mar 2019 09:36:51 +0000
Message-ID: <877ed9lnbg.fsf@gmail.com>
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In-Reply-To: <8736nxzsxj.fsf@gmail.com> (Joseph Vidal-Rosset's message of
	"Fri, 08 Mar 2019 09:11:52 +0100")
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To: Joseph Vidal-Rosset <joseph.vidal.rosset@gmail.com>
Cc: emacs-orgmode list <emacs-orgmode@gnu.org>

On Friday,  8 Mar 2019 at 09:11, Joseph Vidal-Rosset wrote:
> Hello,
>
> I'm trying to export to koma class,  and especially to get the export to
> koma letter but I meet always the same message: 

Two things:

1. could you post a minimal example?

2. what do you see if you M-x toggle-debug-on-error RET first.

I use koma letter export all the time and it works fine for me but I do
think it's fragile.
-- 
Eric S Fraga via Emacs 27.0.50, Org release_9.2.2-249-g51444a