Upgrading 16 to 26

[Lee]

I am planning on making making a huge jump to a AC26 from 16. Understand that it won't be seemless but wanted to know of anything to be aware of and the validity of old project files, libraries and work environments. Any thoughts would be appreciated

[upscalevalley]

I have just tried to jump from AC17 to AC22 and facing issues. 

[Lee Hankins]

What's happened? 17-22 should be fine so long as you load the Migration Libraries.