# C++ created Perception Component crash editor **URL:** \ **Category:** AI\ **Tags:** Perception, ai-controller, unreal-engine, Scripting, Blueprint, question\ **Created:** [March 2, 2016, 9:23am UTC](https://forums.unrealengine.com/t/c-created-perception-component-crash-editor/349277 "2016-03-02T09:23:41Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![maybe\_ilya](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@maybe\_ilya](https://forums.unrealengine.com/u/maybe_ilya)\ **Post date:** [March 2, 2016, 9:23am UTC](https://forums.unrealengine.com/t/c-created-perception-component-crash-editor/349277/1 "2016-03-02T09:23:41Z")
I create AI controller with UAIPerceptionComponent via C++. When I build project there are no any trouble with compilation. After that I create BP inherited from this AIController and try to tweak some values of Sense Config. But it fails because of engine crash. I’ve tried on empty project - same result. Please help!!! =-\ UPD: Creating AIController and attaching Perception Component to this controller via Blueprint Editor doesn’t cause this issue UPD 2: Debugger says that ActualObjToChange is NULL (Engine\Source\Editor\PropertyEditor\Private\PropertyNode.cpp at 2400 line) ![80680-2.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/f/9/d/f9dfb0f169479a31cab40a857137302e725276fd.png) ``` //// PerceptionTest.h #pragma once #include "AIController.h" #include "Perception/AIPerceptionSystem.h" #include "Perception/AIPerceptionComponent.h" #include "Perception/AISenseConfig_Sight.h" #include "PerceptionTest.generated.h" /** * */ UCLASS() class MYPROJECT_API APerceptionTest : public AAIController { GENERATED_BODY() public: APerceptionTest(const FObjectInitializer& ObjectInitializer); UPROPERTY(VisibleDefaultsOnly, BlueprintReadOnly, Category = "Test") UAIPerceptionComponent* PerceptionComp; UPROPERTY(EditDefaultsOnly, BlueprintReadWrite, Category = "Test") UAISenseConfig_Sight* SightConfig; }; //// PerceptionTest.cpp #include "MyProject.h" #include "PerceptionTest.h" APerceptionTest::APerceptionTest(const FObjectInitializer& ObjectInitializer) : Super(ObjectInitializer) { PerceptionComp = ObjectInitializer.CreateDefaultSubobject(this, "Perception Comp"); SightConfig = CreateDefaultSubobject("Sight Sense"); PerceptionComp->ConfigureSense(*SightConfig); PerceptionComp->SetDominantSense(SightConfig->GetSenseImplementation()); SightConfig->DetectionByAffiliation.bDetectEnemies = true; SightConfig->DetectionByAffiliation.bDetectFriendlies = true; SightConfig->DetectionByAffiliation.bDetectNeutrals = true; SightConfig->PeripheralVisionAngleDegrees = 65.f; SightConfig->SightRadius = 1000.f; SightConfig->LoseSightRadius = 1500.f; } ``` ---
**Author:** ![Bino](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Bino](https://forums.unrealengine.com/u/Bino)\ **Post date:** [March 2, 2016, 11:41am UTC](https://forums.unrealengine.com/t/c-created-perception-component-crash-editor/349277/2 "2016-03-02T11:41:17Z")
Can you show me the callstack? ---
**Author:** ![maybe\_ilya](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@maybe\_ilya](https://forums.unrealengine.com/u/maybe_ilya)\ **Post date:** [March 2, 2016, 11:56am UTC](https://forums.unrealengine.com/t/c-created-perception-component-crash-editor/349277/3 "2016-03-02T11:56:34Z")
@Bino Here you are ---
**Author:** ![Bino](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Bino](https://forums.unrealengine.com/u/Bino)\ **Post date:** [March 2, 2016, 12:29pm UTC](https://forums.unrealengine.com/t/c-created-perception-component-crash-editor/349277/4 "2016-03-02T12:29:31Z")
Tough to work out from here. This seems the most positive answer I could find [Client crashes when i try to set values on my sight config in my AI controller BP - AI - Unreal Engine Forums](https://answers.unrealengine.com/questions/240416/client-crashes-when-i-try-to-set-values-on-my-sigh.html) ---
**Author:** ![maybe\_ilya](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@maybe\_ilya](https://forums.unrealengine.com/u/maybe_ilya)\ **Post date:** [March 2, 2016, 12:41pm UTC](https://forums.unrealengine.com/t/c-created-perception-component-crash-editor/349277/5 "2016-03-02T12:41:22Z")
@Bino I’ll try this out, but I think this is very rough workaround. As I can understand, issue I described is UI related, not AI or Perception ---
**Author:** ![anonymous\_user\_2b03d27c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_2b03d27c](https://forums.unrealengine.com/u/anonymous_user_2b03d27c)\ **Post date:** [March 2, 2016, 7:40pm UTC](https://forums.unrealengine.com/t/c-created-perception-component-crash-editor/349277/6 "2016-03-02T19:40:38Z")
Hey napolinkinpark3r- I expereienced the crash you described and have submitted a report for investigation (UE-27729). The crash is tied to defining the UAISenseConfig\_Sight in code. If you remove the lines related to UAISenseConfig\_Sight and SightConfig from the .h and .cpp and instead set these values through the editor you should be able to avoid the crash. Cheers ---
**Author:** ![maybe\_ilya](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@maybe\_ilya](https://forums.unrealengine.com/u/maybe_ilya)\ **Post date:** [March 3, 2016, 7:19am UTC](https://forums.unrealengine.com/t/c-created-perception-component-crash-editor/349277/7 "2016-03-03T07:19:00Z")
Thanks for reply, . I should add remark that crash caused not only by Sight Sense configuration, but by other senses too (Hearing, Damage etc). Hope this issue will be fixed soon =-) ---
**Author:** ![anonymous\_user\_2b03d27c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_2b03d27c](https://forums.unrealengine.com/u/anonymous_user_2b03d27c)\ **Post date:** [March 4, 2016, 3:36pm UTC](https://forums.unrealengine.com/t/c-created-perception-component-crash-editor/349277/8 "2016-03-04T15:36:41Z")
Hey napolinkinpark3r- I found that this crash is fixed in 4.11 and is already included in the current 4.11 Preview 6 available on the Launcher. If you open a copy of your project in this version you should be able to use your current code setup without getting a crash.