Behavior Tree inactive with Level Streaming

Development Programming & Scripting AI
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1

tested with UE 4.19.2 and 4.20.2

After loading a level with Load Stream Level, AI Controllers can execute the Run Behavior Tree node but the Tree remains inactive (will show Can’t find matching actors in the debug dropdown)
Getting the Controller from the Pawn will print the controller’s name, but getting the Pawn from the AIController will print a null string.

Everything is normal if I load the level directly, so I’m unsure if I’m doing something wrong or if it’s a bug.

2

The problem was that in the World Settings, it was not flagged “Enable AISystem”