combinaison impossible de deux PDF

What app does you use?

There's no official limit. I've seen files with thousands of pages, so this is not the issue.

What happens when you try to combine the two files?

assuming acrobat?

in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.

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