What's the last version of Xojo to use GTK2?

I was under the impression that 17r2.1 was still using GTK2. However, upon building my project, I’m still greeted with the “libgtk-3.so.0” missing message. I can’t find anything relating to this ins th1 17r2.1 docs folder.

GTK3 has been introduced with Xojo 2017r2.
So the last version with GTK2 is Xojo 2017r1.1

[quote=396585:@Jürg Otter]GTK3 has been introduced with Xojo 2017r2.
So the last version with GTK2 is Xojo 2017r1.1[/quote]
Thanks - I was heading there next.

btw: you can browse the release notes on the developer site.
The “highlights” are usually on the top, so you’ll quickly find the big changes.

Now, I’m playing the libc version game … It looks like to build a Xojo app for an old enough version of libc for my opportunity requires going back to a non-64bit build version like 2013r3.3. I have a new opportunity for a maritime team where they are still running CentOS 6.8 and won’t be updating until 2020 when their grants allow them to update both their land-side and shipboard systems.