Description

This issue doesn't occur at 4.21. It seems in 4.22 only. Bone is broken in the second SetAnimInstanceClass. It seems CurrentReadComponentTransforms doesn't update.

 

[Workaround]

・Wait using timer without using delay node

・Without using parallel anim evaluation (a.ParallelAnimEvaluation 0)

 

Steps to Reproduce

[Setps]

  1. Open the repro project.
  2. Run PIE

TestActor in level move while changing AnimBP in SetAnimInstanceClass.

Crash on the third run.

 

 

Callstack
Assertion failed: EditableBoneVisibilityStates.Num() == GetNumComponentSpaceTransforms() [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\Components\SkeletalMeshComponent.cpp] [Line: 1554]

UE4Editor_Core!FWindowsErrorOutputDevice::Serialize() [d:\build\++ue4\sync\engine\source\runtime\core\private\windows\windowserroroutputdevice.cpp:79]
UE4Editor_Core!FOutputDevice::LogfImpl() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\outputdevice.cpp:71]
UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:440]
UE4Editor_Core!FDebug::CheckVerifyFailedImpl() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:418]
UE4Editor_Engine!USkeletalMeshComponent::ComputeRequiredBones() [d:\build\++ue4\sync\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:1554]
UE4Editor_Engine!USkeletalMeshComponent::RecalcRequiredBones() [d:\build\++ue4\sync\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:1661]
UE4Editor_Engine!USkeletalMeshComponent::InitAnim() [d:\build\++ue4\sync\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:633]
UE4Editor_Engine!USkeletalMeshComponent::SetAnimInstanceClass() [d:\build\++ue4\sync\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:2647]
UE4Editor_Engine!USkeletalMeshComponent::execK2_SetAnimInstanceClass() [d:\build\++ue4\sync\engine\source\runtime\engine\classes\components\skeletalmeshcomponent.h:281]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4643]
UE4Editor_CoreUObject!UObject::CallFunction() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:904]
UE4Editor_CoreUObject!UObject::ProcessContextOpcode() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2314]
UE4Editor_CoreUObject!ProcessLocalScriptFunction() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:974]
UE4Editor_CoreUObject!UObject::ProcessInternal() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1058]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4643]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1464]
UE4Editor_Engine!AActor::ProcessEvent() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:769]
UE4Editor_Engine!FLatentActionManager::TickLatentActionForObject() [d:\build\++ue4\sync\engine\source\runtime\engine\private\latentactionmanager.cpp:206]
UE4Editor_Engine!FLatentActionManager::ProcessLatentActions() [d:\build\++ue4\sync\engine\source\runtime\engine\private\latentactionmanager.cpp:124]
UE4Editor_Engine!AActor::Tick() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:994]
UE4Editor_Engine!AActor::TickActor() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:970]
UE4Editor_Engine!FActorTickFunction::ExecuteTick() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:164]
UE4Editor_Engine!TGraphTask<FTickFunctionTask>::ExecuteTask() [d:\build\++ue4\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:842]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\build\++ue4\sync\engine\source\runtime\core\private\async\taskgraph.cpp:686]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build\++ue4\sync\engine\source\runtime\core\private\async\taskgraph.cpp:582]
UE4Editor_Core!FTaskGraphImplementation::WaitUntilTasksComplete() [d:\build\++ue4\sync\engine\source\runtime\core\private\async\taskgraph.cpp:1457]
UE4Editor_Engine!FTickTaskSequencer::ReleaseTickGroup() [d:\build\++ue4\sync\engine\source\runtime\engine\private\ticktaskmanager.cpp:557]
UE4Editor_Engine!FTickTaskManager::RunTickGroup() [d:\build\++ue4\sync\engine\source\runtime\engine\private\ticktaskmanager.cpp:1505]
UE4Editor_Engine!UWorld::RunTickGroup() [d:\build\++ue4\sync\engine\source\runtime\engine\private\leveltick.cpp:789]
UE4Editor_Engine!UWorld::Tick() [d:\build\++ue4\sync\engine\source\runtime\engine\private\leveltick.cpp:1568]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\editorengine.cpp:1618]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:403]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3967]
UE4Editor!GuardedMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launch.cpp:168]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:145]
UE4Editor!WinMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:275]
UE4Editor!__scrt_common_main_seh() [d:\agent\_work\3\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]

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Unresolved
ComponentAnim - Animation
Affects Versions4.224.22.2
Target Fix4.25
CreatedMay 27, 2019
UpdatedNov 13, 2019