AI characters not heading towards player even though Hearing is triggered

[ktonegawa]

when I set up my Fire function in FireComponent i saw that my AI characters weren’t responding to me firing my gun. Then I realized the print statements for the AI senses was returning None for the target, even though the perception itself was triggered. I am also noticing these errors when playing:

LogBlueprintUserMessages: [FireComponent] X=2879.884 Y=1086.762 Z=-22.222
LogBlueprintUserMessages: [NPC_AI_BP_C_1] PatrolGaurd4 AISense_Hearing None
PIE: Error: Blueprint Runtime Error: Accessed None trying to read property K2Node_ComponentBoundEvent_Actor from function: 'ExecuteUbergraph_NPC_AI_BP' from node: Branch in graph: EventGraph in object: NPC_AI_BP with description: Accessed None trying to read property K2Node_ComponentBoundEvent_Actor
LogBlueprintUserMessages: Early EndPlayMap Detection: Level '/Game/Dynamic/Levels/FirstPersonExampleMap.FirstPersonExampleMap:PersistentLevel' has LevelScriptBlueprint '/Game/Dynamic/Levels/FirstPersonExampleMap.FirstPersonExampleMap:PersistentLevel.FirstPersonExampleMap' with GeneratedClass '/Game/Dynamic/Levels/FirstPersonExampleMap.FirstPersonExampleMap_C
' with ClassGeneratedBy '/Game/Dynamic/Levels/FirstPersonExampleMap.FirstPersonExampleMap:PersistentLevel.FirstPersonExampleMap'
LogBlueprintUserMessages: Late EndPlayMap Detection: Level '/Game/Dynamic/Levels/FirstPersonExampleMap.FirstPersonExampleMap:PersistentLevel' has LevelScriptBlueprint '/Game/Dynamic/Levels/FirstPersonExampleMap.FirstPersonExampleMap:PersistentLevel.FirstPersonExampleMap' with GeneratedClass '/Game/Dynamic/Levels/FirstPersonExampleMap.FirstPersonExampleMap_C'
 with ClassGeneratedBy '/Game/Dynamic/Levels/FirstPersonExampleMap.FirstPersonExampleMap:PersistentLevel.FirstPersonExampleMap'

Any ideas as to what is wrong? I am using UE4 v4.19.2, here is my latest commit

Edit:
I plugged in the return value of SpawnActor to First Person Projectile BP and this seems to return an actual object, but then it just responds to EVERY character firing…

[DanM]

It would probably be easier to have the player use a tag which the AI controller can use e.g. Player and then use Get Owner as the Instigator.

[ktonegawa]

Thank you for the hint Dan, i basically ended up with this and the AI characters now seemed to react to me firing like how Sam demo’d in the lecture:

I just dont understand why i had to feed in the instigator when Sam didnt have to. Is this just a change between 4.13 and 4.19.2?

[DanM]

I’m pretty sure it’s a bug in Sam’s that just magically worked in that version.