Crash during play, point me in the right direction?

Development Character & Animation
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1

Hi All,

I have been getting a crash when playing my game, happens at a few different points or maybe just randomly so I cant track down what is causing it. Can anyone here get some clues out of this information its the same each time?

Access violation - code c0000005 (first/second chance not available)

UE4Editor_Core!rml::internal::Block::findObjectSize()
UE4Editor_Core!FMallocTBB::Realloc() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\hal\malloctbb.cpp:103]
UE4Editor_Core!FMemory::Realloc() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\core\public\hal\fmemory.inl:48]
UE4Editor_Core!TArray::ResizeForCopy() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\core\public\containers\array.h:2484]
UE4Editor_Core!TArray::operator=() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\core\public\containers\array.h:396]
UE4Editor_Core!FString::operator=() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\core\public\containers\unrealstring.h:1794]
UE4Editor_CoreUObject!TProperty::CopyValuesInternal() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\public\uobject\unrealtype.h:1018]
UE4Editor_CoreUObject!UScriptStruct::CopyScriptStruct() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:2329]
UE4Editor_Engine!UKismetArrayLibrary::GenericArray_Append() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\engine\private\kismetarraylibrary.cpp:120]
UE4Editor_Engine!UKismetArrayLibrary::execArray_Append() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\engine\classes\kismet\kismetarraylibrary.h:333]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4551]
UE4Editor_CoreUObject!UObject::CallFunction() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:763]
UE4Editor_CoreUObject!UObject::ProcessContextOpcode() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2198]
UE4Editor_CoreUObject!UObject::ProcessInternal() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:985]
UE4Editor_CoreUObject!UObject::CallFunction() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:887]
UE4Editor_CoreUObject!UObject::ProcessContextOpcode() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2198]
UE4Editor_CoreUObject!UObject::ProcessInternal() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:985]
UE4Editor_CoreUObject!UObject::CallFunction() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:887]
UE4Editor_CoreUObject!UObject::ProcessInternal() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:985]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4551]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1345]
UE4Editor_AIModule!UBTTask_BlueprintBase::ReceiveExecuteAI()
UE4Editor_AIModule!UBTTask_BlueprintBase::ExecuteTask() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\aimodule\private\behaviortree\tasks\bttask_blueprintbase.cpp:57]
UE4Editor_AIModule!UBehaviorTreeComponent::ExecuteTask() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\aimodule\private\behaviortree\behaviortreecomponent.cpp:1662]
UE4Editor_AIModule!UBehaviorTreeComponent::ProcessExecutionRequest() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\aimodule\private\behaviortree\behaviortreecomponent.cpp:1420]

2

Based on that stack, you are getting a crash while appending to an array on the Execute function of a Behavior Tree Task.

3

Thank you so much. I could not see that. I found the issue around the append array. I was not even looking in the BT. I did not think you had to go that far back in the stack. Anyway, helped a lot thank you.