We are experiencing a persistent crash in Physx code when spawning multiple actors in this version of Unreal. It also happens sometimes when moving actors as well. To be more specific we are spawning lots of characters controlled by AIControllers. Slowly adding characters over time, instead of spawning them in one big chunk just means the crash takes longer to happen. We’ve experimented with turning off as much collision as we can on our character, but it doesn’t seem to improve our chances of not encountering the crash.
Below is a paste of the callstack we get on windows. I couldn’t figure out how to format it correctly, sorry.
Access violation - code c0000005 (first/second chance not available)
PhysX3PROFILE_x64!physx::Sq::IncrementalAABBPrunerCore::updateMapping() [d:\build++ue4+release-4.20+physx_compile\sync\engine\source\thirdparty\physx3\physx_3.4\source\scenequery\src\sqincrementalaabbprunercore.cpp:125]
PhysX3PROFILE_x64!physx::Sq::IncrementalAABBPrunerCore::updateObject() [d:\build++ue4+release-4.20+physx_compile\sync\engine\source\thirdparty\physx3\physx_3.4\source\scenequery\src\sqincrementalaabbprunercore.cpp:245]
PhysX3PROFILE_x64!physx::Sq::AABBPruner::updateObjectsAfterManualBoundsUpdates() [d:\build++ue4+release-4.20+physx_compile\sync\engine\source\thirdparty\physx3\physx_3.4\source\scenequery\src\sqaabbpruner.cpp:157]
PhysX3PROFILE_x64!physx::Sq::PrunerExt::flushShapes() [d:\build++ue4+release-4.20+physx_compile\sync\engine\source\thirdparty\physx3\physx_3.4\source\scenequery\src\sqscenequerymanager.cpp:128]
PhysX3PROFILE_x64!physx::Sq::SceneQueryManager::flushShapes() [d:\build++ue4+release-4.20+physx_compile\sync\engine\source\thirdparty\physx3\physx_3.4\source\scenequery\src\sqscenequerymanager.cpp:381]
PhysX3PROFILE_x64!physx::Sq::SceneQueryManager::flushUpdates() [d:\build++ue4+release-4.20+physx_compile\sync\engine\source\thirdparty\physx3\physx_3.4\source\scenequery\src\sqscenequerymanager.cpp:398]
PhysX3PROFILE_x64!physx::NpSceneQueries::multiQuery() [d:\build++ue4+release-4.20+physx_compile\sync\engine\source\thirdparty\physx3\physx_3.4\source\physx\src\npscenequeries.cpp:730]
PhysX3PROFILE_x64!physx::NpSceneQueries::overlap() [d:\build++ue4+release-4.20+physx_compile\sync\engine\source\thirdparty\physx3\physx_3.4\source\physx\src\npscenequeries.cpp:104]
UE4Editor_Engine!GeomOverlapMultiImp_PhysX<0>() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\collision\physxcollision.cpp:1586]
UE4Editor_Engine!GeomOverlapMulti() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\collision\physxcollision.cpp:1706]
UE4Editor_Engine!UWorld::OverlapMultiByChannel() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\collision\worldcollision.cpp:139]
UE4Editor_Engine!ComponentEncroachesBlockingGeometry_WithAdjustment() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\levelactor.cpp:919]
UE4Editor_Engine!UWorld::EncroachingBlockingGeometry() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\levelactor.cpp:1045]
UE4Editor_Engine!UWorld::FindTeleportSpot() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\levelactor.cpp:771]
UE4Editor_Engine!AActor::PostActorConstruction() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\actor.cpp:3018]
UE4Editor_Engine!AActor::FinishSpawning() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\actor.cpp:2974]
UE4Editor_Engine!UGameplayStatics::FinishSpawningActor() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\gameplaystatics.cpp:575]
UE4Editor_Engine!UGameplayStatics::execFinishSpawningActor() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\classes\kismet\gameplaystatics.h:42]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4728]
UE4Editor_CoreUObject!UObject::CallFunction() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:772]
UE4Editor_CoreUObject!UObject::ProcessContextOpcode() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2197]
UE4Editor_CoreUObject!UObject::execLetObj() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2019]
UE4Editor_CoreUObject!UObject::ProcessInternal() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:984]
UE4Editor_CoreUObject!UObject::CallFunction() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:896]
UE4Editor_CoreUObject!UObject::ProcessInternal() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:984]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4728]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1344]
UE4Editor_Engine!AActor::ProcessEvent() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\actor.cpp:724]
(private code omitted)
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4728]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1344]
UE4Editor_Engine!AActor::ProcessEvent() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\actor.cpp:724]
UE4Editor_Engine!FObjectReplicator::ReceivedRPC() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\datareplication.cpp:872]
UE4Editor_Engine!FObjectReplicator::ReceivedBunch() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\datareplication.cpp:743]
UE4Editor_Engine!UActorChannel::ProcessBunch() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\datachannel.cpp:2385]
UE4Editor_Engine!UActorChannel::ReceivedBunch() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\datachannel.cpp:2243]
UE4Editor_Engine!UChannel::ReceivedSequencedBunch() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\datachannel.cpp:309]
UE4Editor_Engine!UChannel::ReceivedNextBunch() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\datachannel.cpp:684]
UE4Editor_Engine!UChannel::ReceivedRawBunch() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\datachannel.cpp:403]
UE4Editor_Engine!UNetConnection::ReceivedPacket() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\netconnection.cpp:1666]
UE4Editor_Engine!UNetConnection::ReceivedRawPacket() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\netconnection.cpp:976]
UE4Editor_OnlineSubsystemUtils!UIpNetDriver::TickDispatch() [d:\build++ue4+release-4.20+compile\sync\engine\plugins\online\onlinesubsystemutils\source\onlinesubsystemutils\private\ipnetdriver.cpp:236]
UE4Editor_Engine!TBaseUObjectMethodDelegateInstance<0,UNetDriver,void __cdecl(float)>::ExecuteIfSafe() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:659]
UE4Editor_Engine!TBaseMulticastDelegate::Broadcast() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:937]
UE4Editor_Engine!UWorld::Tick() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\engine\private\leveltick.cpp:1339]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\build++ue4+release-4.20+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:1691]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\build++ue4+release-4.20+compile\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:403]
UE4Editor!FEngineLoop::Tick() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3486]
UE4Editor!GuardedMain() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\launch\private\launch.cpp:166]
UE4Editor!GuardedMainWrapper() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:144]
UE4Editor!WinMain() [d:\build++ue4+release-4.20+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:223]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283]
kernel32
ntdll
