From mboxrd@z Thu Jan  1 00:00:00 1970
From: Melleus <melleus@openmailbox.org>
Subject: Re: Cannot sync with caldav anymore
Date: Fri, 16 Feb 2018 16:43:52 +0200
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References: <87sha18a13.fsf@openmailbox.org> <873721hyll.fsf@nicolasgoaziou.fr>
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Nicolas Goaziou <mail@nicolasgoaziou.fr> writes:

> Hello,
>
> <basilio@gmx.com> writes:
>
>> After updating to Org mode version 9.1.6 (9.1.6-48-gfe7619-elpa) I lost
>> ability to sync with caldav (which I use for syncing my schedule with
>> Nextcloud <-> Android). Before the update everything was perfect. And I
>> beleive that everything is ok with org-caldav as there were no updates
>> for it this time. I use emacs package system for updating and therefore
>> I cannot downgrade the org-mode. And I heavily rely on it in my daily
>> routines. So I'm stuck and need some advice.
>>
>> Debugger entered--Lisp error: (wrong-type-argument stringp ARCHIVE)
>>   string-match("{.+?}" ARCHIVE)
>>   org-tags-expand(ARCHIVE t)
>>   #[257 "\300\301\"\207" [org-tags-expand t] 4 "\n\n(fn TAG)"](ARCHIVE)
>>   mapcar(#[257 "\300\301\"\207" [org-tags-expand t] 4 "\n\n(fn TAG)"] (ARCHIVE))
>>   cl-mapcar(#[257 "\300\301\"\207" [org-tags-expand t] 4 "\n\n(fn TAG)"] (ARCHIVE))
>>   apply(cl-mapcar #[257 "\300\301\"\207" [org-tags-expand t] 4 "\n\n(fn TAG)"] (ARCHIVE) nil)
>>   cl-mapcan(#[257 "\300\301\"\207" [org-tags-expand t] 4 "\n\n(fn TAG)"] (ARCHIVE))
>
> This is difficult to tell because the backtrace is not complete, and it
> is compiled. AFAICT, somewhere, you have a list of tags like '(ARCHIVE)
> but it should be '("ARCHIVE").
>
> If that doesn't ring a bell, please a complete, un-compiled backtrace
> (i.e., using C-u M-x org-reload).
>
> Regards,

The bell just have rung. I got exactly that in my .emacs:

(setq org-caldav-exclude-tags '(ARCHIVE))

after changing it to:

(setq org-caldav-exclude-tags '("ARCHIVE"))

the syncing works again. I just cannot understand why it was working
before. And sorry for bothering you with that backtrace file. The issue
is solved.

Thank you a lot.