It’s my first post in this forum so the most important thing :
thank you to all of you, your community always been a big help in my work, just from reading you.
With my students, we are working on a big project since the beginning of the year, so we started on 4.13.
We updated unreal to 4.15.2 and now, the project isn’t working because of lots of errors inside the Level Blueprint :
I have only one pointlight3 BP, I used a get all actor of class just to see if it works.
The whole project is broken, everything using a direct reference (lights on this exemple, but same problem for level sequence reference which wont play, etc etc etc.)
If I do from scratch, on a new project, something as simple as overlapping trigger -> toggle light visibility (just like the very basics tutorial) - it doesn’t work!!
You should report it with the reproduction steps you’ve provided here.
In the meantime, you could use a workaround and don’t code in the Level Blueprint (but as a teacher I understand you might walk away from the path you’ve chosen).
Maybe is it because they are light components and they are tied to the lightning build. Maybe it says “no” because lightning has not been built. What do you say? And the bug happens after you copy / paste a map (a for some reason the lightning build is not copied and paster with it).
I just tested in 4.15.2 with a simple cube in the scene (from the Level Blueprint). Every 0.2 seconds I move it by 50 in Z and I have no null ref issue.