I’ve run into a minor annoyance following this guide https://docs.unrealengine.com/latest/INT/Engine/AI/BehaviorTrees/QuickStart/index.html
Everything works as expected (Thereabouts), but I get this error.
Error Blueprint Runtime Error: Accessed None trying to read property CallFunc_GetBlackboardValueAsActor_ReturnValue from function: 'PerformConditionCheck' from node: Return Node in graph: PerformConditionCheck in object: CloseEnough with description: Accessed None trying to read property CallFunc_GetBlackboardValueAsActor_ReturnValue
If I keep the error log open when playing, the message appears to floor the log whenever the player moves to somewhere the AI can’t reach, not out of view.
The error seems to be with this Blueprint https://docs.unrealengine.com/latest/INT/Engine/AI/BehaviorTrees/QuickStart/13/index.html
And here is how mine looks. http://i.imgur.com/jlZ5kAE.png
As far as I can tell, I have followed the guide exactly. I have the exact same setup in another project which isn’t throwing out errors, until I compiled. Now that class is giving the NOTE message on the cast node also.
So i’m wondering if its something to do with the guide being made for an earlier version.
Any help would be very much appreciated!