EXCEPTION_ACCESS_VIOLATION 0x00000000 when attaching Oculus Hands from client on dedicated server UE4.25.1

Stumpae · August 31, 2020, 6:29am

If using blueprints and attaching Oculus hands to character that is locally controlled, game acts as expected, client sees oculus hands. If you then join a server as a client and call the attachment as non-locally controlled (so that other clients can see your oculus hands) the server kernel panics and quits. Have attached blueprints as well. Any idea how to work around it?

[2020.08.27-20.10.21:625][744]LogWindows: Error: === Critical error: ===
[2020.08.27-20.10.21:626][744]LogWindows: Error:
[2020.08.27-20.10.21:627][744]LogWindows: Error: Fatal error!
[2020.08.27-20.10.21:627][744]LogWindows: Error:
[2020.08.27-20.10.21:627][744]LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION 0x00000000
[2020.08.27-20.10.21:628][744]LogWindows: Error:
[2020.08.27-20.10.21:629][744]LogWindows: Error: [Callstack] 0x0000000000000000 UnknownFunction []
[2020.08.27-20.10.21:629][744]LogWindows: Error: [Callstack] 0x00007fff342c7f01 UE4Editor-OculusInput.dll!OculusInput::FOculusHandTracking::GetHandSkeletalMesh() [...\unrealengine\engine\plugins\runtime\oculus\oculusvr\source\oculusinput\private\oculushandtracking.cpp:173]
[2020.08.27-20.10.21:629][744]LogWindows: Error: [Callstack] 0x00007fff342ca0ce UE4Editor-OculusInput.dll!UOculusHandComponent::InitializeSkeletalMesh() [...\unrealengine\engine\plugins\runtime\oculus\oculusvr\source\oculusinput\private\oculushandcomponent.cpp:48]
[2020.08.27-20.10.21:630][744]LogWindows: Error: [Callstack] 0x00007fff4eb3c392 UE4Editor-Engine.dll!AActor::BeginPlay() [...\unrealengine\engine\source\runtime\engine\private\actor.cpp:3435]
[2020.08.27-20.10.21:630][744]LogWindows: Error: [Callstack] 0x00007fff4eb47c7c UE4Editor-Engine.dll!AActor::DispatchBeginPlay() [...\unrealengine\engine\source\runtime\engine\private\actor.cpp:3397]
[2020.08.27-20.10.21:630][744]LogWindows: Error: [Callstack] 0x00007fff4eb6e2f2 UE4Editor-Engine.dll!AActor::PostActorConstruction() [...\unrealengine\engine\source\runtime\engine\private\actor.cpp:3238]
[2020.08.27-20.10.21:631][744]LogWindows: Error: [Callstack] 0x00007fff4eb545b4 UE4Editor-Engine.dll!AActor::FinishSpawning() [...\unrealengine\engine\source\runtime\engine\private\actor.cpp:3137]
[2020.08.27-20.10.21:631][744]LogWindows: Error: [Callstack] 0x00007fff4f21f30a UE4Editor-Engine.dll!UGameplayStatics::FinishSpawningActor() [...\unrealengine\engine\source\runtime\engine\private\gameplaystatics.cpp:689]
[2020.08.27-20.10.21:632][744]LogWindows: Error: [Callstack] 0x00007fff4feeb0e6 UE4Editor-Engine.dll!UGameplayStatics::execFinishSpawningActor() [...\unrealengine\engine\intermediate\build\win64\ue4editor\inc\engine\gameplaystatics.gen.cpp:1342]
[2020.08.27-20.10.21:632][744]LogWindows: Error: [Callstack] 0x00007fff688399d1 UE4Editor-CoreUObject.dll!UObject::execCallMathFunction() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:860]
[2020.08.27-20.10.21:633][744]LogWindows: Error: [Callstack] 0x00007fff6883bf20 UE4Editor-CoreUObject.dll!UObject::execLetObj() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2617]
[2020.08.27-20.10.21:633][744]LogWindows: Error: [Callstack] 0x00007fff68815672 UE4Editor-CoreUObject.dll!ProcessLocalScriptFunction() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:997]
[2020.08.27-20.10.21:634][744]LogWindows: Error: [Callstack] 0x00007fff687e4f5b UE4Editor-CoreUObject.dll!ProcessScriptFunction() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:828]
[2020.08.27-20.10.21:634][744]LogWindows: Error: [Callstack] 0x00007fff688152b6 UE4Editor-CoreUObject.dll!ProcessLocalFunction() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1058]
[2020.08.27-20.10.21:635][744]LogWindows: Error: [Callstack] 0x00007fff68815672 UE4Editor-CoreUObject.dll!ProcessLocalScriptFunction() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:997]
[2020.08.27-20.10.21:637][744]LogWindows: Error: [Callstack] 0x00007fff68814b34 UE4Editor-CoreUObject.dll!UObject::ProcessInternal() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1085]
[2020.08.27-20.10.21:637][744]LogWindows: Error: [Callstack] 0x00007fff685a2178 UE4Editor-CoreUObject.dll!UFunction::Invoke() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\class.cpp:5542]
[2020.08.27-20.10.21:638][744]LogWindows: Error: [Callstack] 0x00007fff68814667 UE4Editor-CoreUObject.dll!UObject::ProcessEvent() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1916]
[2020.08.27-20.10.21:638][744]LogWindows: Error: [Callstack] 0x00007fff4eb71f5f UE4Editor-Engine.dll!AActor::ProcessEvent() [...\unrealengine\engine\source\runtime\engine\private\actor.cpp:798]
[2020.08.27-20.10.21:639][744]LogWindows: Error: [Callstack] 0x00007fff4eb3c3f7 UE4Editor-Engine.dll!AActor::BeginPlay() [...\unrealengine\engine\source\runtime\engine\private\actor.cpp:3457]
[2020.08.27-20.10.21:639][744]LogWindows: Error: [Callstack] 0x00007fff4eb47c7c UE4Editor-Engine.dll!AActor::DispatchBeginPlay() [...\unrealengine\engine\source\runtime\engine\private\actor.cpp:3397]
[2020.08.27-20.10.21:640][744]LogWindows: Error: [Callstack] 0x00007fff4eb6e2f2 UE4Editor-Engine.dll!AActor::PostActorConstruction() [...\unrealengine\engine\source\runtime\engine\private\actor.cpp:3238]
[2020.08.27-20.10.21:640][744]LogWindows: Error: [Callstack] 0x00007fff4eb545b4 UE4Editor-Engine.dll!AActor::FinishSpawning() [...\unrealengine\engine\source\runtime\engine\private\actor.cpp:3137]
[2020.08.27-20.10.21:641][744]LogWindows: Error: [Callstack] 0x00007fff4f21f30a UE4Editor-Engine.dll!UGameplayStatics::FinishSpawningActor() [...\unrealengine\engine\source\runtime\engine\private\gameplaystatics.cpp:689]
[2020.08.27-20.10.21:641][744]LogWindows: Error: [Callstack] 0x00007fff4feeb0e6 UE4Editor-Engine.dll!UGameplayStatics::execFinishSpawningActor() [...\unrealengine\engine\intermediate\build\win64\ue4editor\inc\engine\gameplaystatics.gen.cpp:1342]
[2020.08.27-20.10.21:642][744]LogWindows: Error: [Callstack] 0x00007fff688399d1 UE4Editor-CoreUObject.dll!UObject::execCallMathFunction() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:860]
[2020.08.27-20.10.21:642][744]LogWindows: Error: [Callstack] 0x00007fff6883bf20 UE4Editor-CoreUObject.dll!UObject::execLetObj() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2617]
[2020.08.27-20.10.21:642][744]LogWindows: Error: [Callstack] 0x00007fff68815672 UE4Editor-CoreUObject.dll!ProcessLocalScriptFunction() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:997]
[2020.08.27-20.10.21:642][744]LogWindows: Error: [Callstack] 0x00007fff687e4f5b UE4Editor-CoreUObject.dll!ProcessScriptFunction() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:828]
[2020.08.27-20.10.21:644][744]LogWindows: Error: [Callstack] 0x00007fff688152b6 UE4Editor-CoreUObject.dll!ProcessLocalFunction() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1058]
[2020.08.27-20.10.21:645][744]LogWindows: Error: [Callstack] 0x00007fff68815672 UE4Editor-CoreUObject.dll!ProcessLocalScriptFunction() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:997]
[2020.08.27-20.10.21:645][744]LogWindows: Error: [Callstack] 0x00007fff68814b34 UE4Editor-CoreUObject.dll!UObject::ProcessInternal() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1085]
[2020.08.27-20.10.21:646][744]LogWindows: Error: [Callstack] 0x00007fff685a2178 UE4Editor-CoreUObject.dll!UFunction::Invoke() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\class.cpp:5542]
[2020.08.27-20.10.21:648][744]LogWindows: Error: [Callstack] 0x00007fff68814667 UE4Editor-CoreUObject.dll!UObject::ProcessEvent() [...\unrealengine\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1916]
[2020.08.27-20.10.21:648][744]LogWindows: Error: [Callstack] 0x00007fff4eb71f5f UE4Editor-Engine.dll!AActor::ProcessEvent() [...\unrealengine\engine\source\runtime\engine\private\actor.cpp:798]
[2020.08.27-20.10.21:648][744]LogWindows: Error: [Callstack] 0x00007fff4fee6919 UE4Editor-Engine.dll!AGameModeBase::K2_PostLogin() [...\unrealengine\engine\intermediate\build\win64\ue4editor\inc\engine\gamemodebase.gen.cpp:315]
[2020.08.27-20.10.21:649][744]LogWindows: Error: [Callstack] 0x00007fff4f237288 UE4Editor-Engine.dll!AGameModeBase::PostLogin() [...\unrealengine\engine\source\runtime\engine\private\gamemodebase.cpp:989]
[2020.08.27-20.10.21:649][744]LogWindows: Error: [Callstack] 0x00007fff4f237070 UE4Editor-Engine.dll!AGameMode::PostLogin() [...\unrealengine\engine\source\runtime\engine\private\gamemode.cpp:132]
[2020.08.27-20.10.21:650][744]LogWindows: Error: [Callstack] 0x00007fff4f3fb9d0 UE4Editor-Engine.dll!UWorld::SpawnPlayActor() [...\unrealengine\engine\source\runtime\engine\private\levelactor.cpp:804]
[2020.08.27-20.10.21:650][744]LogWindows: Error: [Callstack] 0x00007fff4fdbdda6 UE4Editor-Engine.dll!UWorld::NotifyControlMessage() [...\unrealengine\engine\source\runtime\engine\private\world.cpp:5175]
[2020.08.27-20.10.21:651][744]LogWindows: Error: [Callstack] 0x00007fff4f08923e UE4Editor-Engine.dll!UControlChannel::ReceivedBunch() [...\unrealengine\engine\source\runtime\engine\private\datachannel.cpp:1567]
[2020.08.27-20.10.21:651][744]LogWindows: Error: [Callstack] 0x00007fff4f08bf73 UE4Editor-Engine.dll!UChannel::ReceivedSequencedBunch() [...\unrealengine\engine\source\runtime\engine\private\datachannel.cpp:382]
[2020.08.27-20.10.21:651][744]LogWindows: Error: [Callstack] 0x00007fff4f08b55a UE4Editor-Engine.dll!UChannel::ReceivedNextBunch() [...\unrealengine\engine\source\runtime\engine\private\datachannel.cpp:796]
[2020.08.27-20.10.21:652][744]LogWindows: Error: [Callstack] 0x00007fff4f08bb30 UE4Editor-Engine.dll!UChannel::ReceivedRawBunch() [...\unrealengine\engine\source\runtime\engine\private\datachannel.cpp:480]
[2020.08.27-20.10.21:652][744]LogWindows: Error: [Callstack] 0x00007fff4f5c4453 UE4Editor-Engine.dll!UNetConnection::ReceivedPacket() [...\unrealengine\engine\source\runtime\engine\private\netconnection.cpp:2683]
[2020.08.27-20.10.21:653][744]LogWindows: Error: [Callstack] 0x00007fff4f5c5ff1 UE4Editor-Engine.dll!UNetConnection::ReceivedRawPacket() [...\unrealengine\engine\source\runtime\engine\private\netconnection.cpp:1293]
[2020.08.27-20.10.21:654][744]LogWindows: Error: [Callstack] 0x00007fff41e6f225 UE4Editor-OnlineSubsystemUtils.dll!UIpNetDriver::TickDispatch() [...\unrealengine\engine\plugins\online\onlinesubsystemutils\source\onlinesubsystemutils\private\ipnetdriver.cpp:1294]
[2020.08.27-20.10.21:654][744]LogWindows: Error: [Callstack] 0x00007fff4f5fb18f UE4Editor-Engine.dll!TBaseUObjectMethodDelegateInstance<0,UNetDriver,void __cdecl(float)>::ExecuteIfSafe() [...\unrealengine\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:716]
[2020.08.27-20.10.21:655][744]LogWindows: Error: [Callstack] 0x00007fff4eab4a5e UE4Editor-Engine.dll!TBaseMulticastDelegate::Broadcast() [...\unrealengine\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:1013]
[2020.08.27-20.10.21:655][744]LogWindows: Error: [Callstack] 0x00007fff4f3fcd22 UE4Editor-Engine.dll!UWorld::Tick() [...\unrealengine\engine\source\runtime\engine\private\leveltick.cpp:1426]
[2020.08.27-20.10.21:655][744]LogWindows: Error: [Callstack] 0x00007fff4f1edead UE4Editor-Engine.dll!UGameEngine::Tick() [...\unrealengine\engine\source\runtime\engine\private\gameengine.cpp:1706]
[2020.08.27-20.10.21:658][744]LogWindows: Error: [Callstack] 0x00007ff781797ec3 UE4Editor.exe!FEngineLoop::Tick() [...\unrealengine\engine\source\runtime\launch\private\launchengineloop.cpp:4850]
[2020.08.27-20.10.21:659][744]LogWindows: Error: [Callstack] 0x00007ff7817acc3c UE4Editor.exe!GuardedMain() [...\unrealengine\engine\source\runtime\launch\private\launch.cpp:169]
[2020.08.27-20.10.21:659][744]LogWindows: Error: [Callstack] 0x00007ff7817acd1a UE4Editor.exe!GuardedMainWrapper() [...\unrealengine\engine\source\runtime\launch\private\windows\launchwindows.cpp:137]
[2020.08.27-20.10.21:660][744]LogWindows: Error: [Callstack] 0x00007ff7817bf72d UE4Editor.exe!WinMain() [...\unrealengine\engine\source\runtime\launch\private\windows\launchwindows.cpp:268]
[2020.08.27-20.10.21:660][744]LogWindows: Error: [Callstack] 0x00007ff7817c2a4e UE4Editor.exe!__scrt_common_main_seh() [d:\agent_work\2\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
[2020.08.27-20.10.21:660][744]LogWindows: Error: [Callstack] 0x00007fffc8ef7bd4 KERNEL32.DLL!UnknownFunction []
[2020.08.27-20.10.21:660][744]LogWindows: Error: [Callstack] 0x00007fffcaa2ce51 ntdll.dll!UnknownFunction []
[2020.08.27-20.10.21:661][744]LogWindows: Error:
[2020.08.27-20.10.21:671][744]LogExit: Executing StaticShutdownAfterError
[2020.08.27-20.10.21:673][744]LogWindows: FPlatformMisc::RequestExit(1)
[2020.08.27-20.10.21:673][744]LogCore: Engine exit requested (reason: Win RequestExit)
[2020.08.27-20.10.21:683][744]Log file closed, 08/27/20 14:10:21

Stumpae · September 20, 2020, 2:01am

Here’s a work-around suggested on the github issue created for this:

I attached a poseable mesh to my character and targeted the OculusHand Skeleton you can pull from the Hands example on the Oculus SDK download. This allows you to spawn the oculus hands on client machines without crashing. Threw in some logic about replicating controller bones to poseable mesh bones by copying bone location of locally controlled oculus hands and voila, you can replicate oculus hands to clients!