Have you tried 4.2.1?
My more complicated Behavior Trees did not work in 4.2, while the simple ones did. When I upgraded to 4.2.1 the issues I was having were fixed.
Hi,
I’ve programmed a simple AI to patrol and attack the player in blueprints and when i first add things in the behaviour tree, everything works as it should but when i restart the editor i get a bug on the nodes saying “Reinst” (See picture).
I need to add the service and the move to enemy node and the attack enemy node again every time i restart the editor for it to work. My other nodes, updating the path work just fine every time i restart the editor so it patrols but wont attack because of this issue.
I’ve taken a look at another thread with something similar but didn’t see any fixes on that i could use, do i really have to install the engine from source?
Some additional info is that i ported this project from 4.1 to 4.2 but everything seemed to work fine, didn’t get any errors. I didn’t create this AI system in 4.1 though, i created it in 4.2 after the port of the project but still it does this.
Can anyone help me with this?
Thanks,
Oh really? Thanks, I’ll download 4.2.1 now and give it a shot 
I can confirm updating to 4.2.1 fixed the issue just in case anyone runs into this in the future. Thanks for the help !
Yeah, there was a blueprint-related bug in 4.2 which is officially fixed in 4.2.1