Hi hib0823,
I’d recommend you build your project in “Debug Mode” (from visual studio) and Run-Debug rather than Execute.
That way Visual Studio will break on that line (205) and you will have access to all the variables and the call stack - this will help a great deal in locating the problem.
Without seeing the code for AddActorToArray it’s hard to tell what would be happening.
using the “check()” macro for OtherActor and testing that the ActorInRange TArray is populated would be the first things though…