See https://list.orgmode.org/orgmode/87edkhnbn4.fsf@shell.onfire.org/
Perfect, that solve the problem ! Incredible reactivity, thanks !

I now also backported the fix onto bugfix branch.
https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=558db89e4 
I don't really understand what mean that : what should I do to have this ? Update org-mode ? Another things ? 

Thanks you for your help ^^

Now that I have the diary in front of me, I get the impression that there's another problem, and I guess it's not as simple as a simple regular expression.

if I have the following heading :

* A test
 [2023-10-10 Tue 17:25]--[2023-10-10 Tue 17:30]
 <2023-10-10 Tue 17:25>--<2023-10-10 Tue 17:30>

The "org interval" are not respected for the inactive timestamp. See what is the result in org-agenda :

 17:25-17:30   A test
 17:25-17:25  [ A test
 17:30-17:30  [ A test

The first line is what I want : a beginning hour, with a end. But, the two other are not normal : it must be the same line.
Must I send another mail not in this conversation ?

Thanks you again for your futur answer

Le mar. 10 oct. 2023 à 17:47, Ihor Radchenko <yantar92@posteo.net> a écrit :
Cletip Cletip <clement020302@gmail.com> writes:

> I just encountered a strange bug (maybe) in org-mode, starting from version
> 9.6. I don't quite understand why, but it happens when I display the agenda
> (to be precise: M-x org-agenda a).
>
> This only happens (from the causes I found) when there is: SCHEDULED with
> inactive timestamp without a parent heading. This triggers the following
> error for me:
>
> Search failed: "\<SCHEDULED: *<\([^>]+\)>"

See https://list.orgmode.org/orgmode/87edkhnbn4.fsf@shell.onfire.org/
I now also backported the fix onto bugfix branch.
https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=558db89e4

--
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>