Subject: bug#56499: 28.1; Unable to open large file

From: Eli Zaretskii <[email-masked]>
Date: Tue, 12 Jul 2022 16:51:58 +0300

> Date: Tue, 12 Jul 2022 15:46:40 +0200
> From: Juan Jose Garcia Ripoll <[email-masked]>
> Cc: Eli Zaretskii <[email-masked]>, [email-masked]
> 
> I tried evaluating find-file-name-handler as suggested and it returns nil. I suspect it is due to OneDrive (and
> now also Nextcloud's) virtual files, which live online until requested. Somehow opening the file does not
> trigger the required download.

Does the problem only happen with files that are not downloaded from
the cloud?  What if you tell OneDrive to download that file, then try
again -- does the problem go away then?