From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Subject: Re: Frequent "wrong-type-argument stringp nil" error when
 clocking-in in agenda view
Date: Sun, 04 Feb 2018 23:14:46 +0100
Message-ID: <87zi4oh06h.fsf@nicolasgoaziou.fr>
References: <CAG2+eojNq8JzyCLi+LkcT8tJsKRqCgWFKia1vQRsVdGdDfamJw@mail.gmail.com>
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	(Zongheng Yang's message of "Mon, 29 Jan 2018 07:16:09 +0000")
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To: Zongheng Yang <zongheng.y@gmail.com>
Cc: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>

Hello,

Zongheng Yang <zongheng.y@gmail.com> writes:

> Hi everyone,
>
> I have this frequent error (but not always), when I'm in the org agenda
> view trying to clock in the task under cursor. Here's a stack trace:
>
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>   org-agenda-clock-in(nil)
>   funcall-interactively(org-agenda-clock-in nil)
>   call-interactively(org-agenda-clock-in nil nil)
>   command-execute(org-agenda-clock-in)
>
> Note, every time this occurs, I can refresh the agenda view, then clock in
> with no problems.  But this refreshing gets tiring..
>
> Any help?  I'm using org-plus-contrib-20171106, Emacs 25.3.2.

Could you try upgrading Org mode?

Regards,

-- 
Nicolas Goaziou