Unreal Engine Issues and Bug Tracker (UE-131975)

Description

This issue has not occurred in previous versions and seems to occur from 4.27.

Steps to Reproduce

Create a BP that inherits the Scene component.
Add a Transform variable and expose it to Cinematic
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Create a BP and add the Scene component BP created in step 1.
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Create a Level Sequence and add that BP
Crash when trying to create a track for a Transform variable
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Callstack

LogWindows: Error: === Critical error: ===
LogWindows: Error: 
LogWindows: Error: Assertion failed: Header [File:G:\UE4_27\Engine\Source\Runtime\MovieScene\Public\EntitySystem/MovieSceneEntitySystemTypes.h] [Line: 612] 
LogWindows: Error: 
LogWindows: Error: 
LogWindows: Error: 
LogWindows: Error: [Callstack] 0x00007ffda34e4f99 KERNELBASE.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ffcb8720316 UE4Editor-Core.dll!ReportAssert() [G:\UE4_27\Engine\Source\Runtime\Core\Private\Windows\WindowsPlatformCrashContext.cpp:1644]
LogWindows: Error: [Callstack] 0x00007ffcb8724318 UE4Editor-Core.dll!FWindowsErrorOutputDevice::Serialize() [G:\UE4_27\Engine\Source\Runtime\Core\Private\Windows\WindowsErrorOutputDevice.cpp:78]
LogWindows: Error: [Callstack] 0x00007ffcb844252d UE4Editor-Core.dll!FOutputDevice::LogfImpl() [G:\UE4_27\Engine\Source\Runtime\Core\Private\Misc\OutputDevice.cpp:61]
LogWindows: Error: [Callstack] 0x00007ffcb8396b45 UE4Editor-Core.dll!AssertFailedImplV() [G:\UE4_27\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:104]
LogWindows: Error: [Callstack] 0x00007ffcb83981a0 UE4Editor-Core.dll!FDebug::CheckVerifyFailedImpl() [G:\UE4_27\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:461]
LogWindows: Error: [Callstack] 0x00007ffcac00e63b UE4Editor-MovieSceneTracks.dll!UE::MovieScene::TInitialValueProcessorImpl<UE::MovieScene::TIndirectPropertyTraits<FTransform,UE::MovieScene::FIntermediate3DTransform>,UE::MovieScene::TPropertyMetaData<>,TIntegerSequence<int> >::VisitAllocationCached() [G:\UE4_27\Engine\Source\Runtime\MovieScene\Public\EntitySystem\MovieScenePropertyComponentHandler.h:154]
LogWindows: Error: [Callstack] 0x00007ffcabf9ae58 UE4Editor-MovieSceneTracks.dll!UE::MovieScene::FInitialValueMutation::InitializeAllocation() [G:\UE4_27\Engine\Source\Runtime\MovieSceneTracks\Private\Systems\MovieSceneInitialValueSystem.cpp:69]
LogWindows: Error: [Callstack] 0x00007ffcac22de0a UE4Editor-MovieScene.dll!UE::MovieScene::FEntityManager::MutateAll() [G:\UE4_27\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntityManager.cpp:1647]
LogWindows: Error: [Callstack] 0x00007ffcabfa80f8 UE4Editor-MovieSceneTracks.dll!UMovieSceneInitialValueSystem::OnRun() [G:\UE4_27\Engine\Source\Runtime\MovieSceneTracks\Private\Systems\MovieSceneInitialValueSystem.cpp:130]
LogWindows: Error: [Callstack] 0x00007ffcac24bbe9 UE4Editor-MovieScene.dll!UMovieSceneEntitySystem::Run() [G:\UE4_27\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntitySystem.cpp:361]
LogWindows: Error: [Callstack] 0x00007ffcac1c65fd UE4Editor-MovieScene.dll!FMovieSceneEntitySystemGraph::ExecutePhase<TArray<unsigned short,TInlineAllocator<8,TSizedDefaultAllocator<32> > > >() [G:\UE4_27\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntitySystemGraphs.cpp:760]
LogWindows: Error: [Callstack] 0x00007ffcac21c264 UE4Editor-MovieScene.dll!FMovieSceneEntitySystemRunner::GameThread_InstantiationPhase() [G:\UE4_27\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntitySystemRunner.cpp:371]
LogWindows: Error: [Callstack] 0x00007ffcac21dd70 UE4Editor-MovieScene.dll!FMovieSceneEntitySystemRunner::GameThread_SpawnPhase() [G:\UE4_27\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntitySystemRunner.cpp:354]
LogWindows: Error: [Callstack] 0x00007ffcac21d8d7 UE4Editor-MovieScene.dll!FMovieSceneEntitySystemRunner::GameThread_ProcessQueue() [G:\UE4_27\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntitySystemRunner.cpp:272]
LogWindows: Error: [Callstack] 0x00007ffcac20bbc6 UE4Editor-MovieScene.dll!FMovieSceneEntitySystemRunner::DoFlushUpdateQueueOnce() [G:\UE4_27\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntitySystemRunner.cpp:179]
LogWindows: Error: [Callstack] 0x00007ffcac219bfd UE4Editor-MovieScene.dll!FMovieSceneEntitySystemRunner::Flush() [G:\UE4_27\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntitySystemRunner.cpp:147]
LogWindows: Error: [Callstack] 0x00007ffcac29aeba UE4Editor-MovieScene.dll!FMovieSceneRootEvaluationTemplateInstance::Evaluate() [G:\UE4_27\Engine\Source\Runtime\MovieScene\Private\Evaluation\MovieSceneEvaluationTemplateInstance.cpp:147]
LogWindows: Error: [Callstack] 0x00007ffca5745d7e UE4Editor-Sequencer.dll!FSequencer::EvaluateInternal() [G:\UE4_27\Engine\Source\Editor\Sequencer\Private\Sequencer.cpp:3350]
LogWindows: Error: [Callstack] 0x00007ffca57d47a9 UE4Editor-Sequencer.dll!FSequencer::Tick() [G:\UE4_27\Engine\Source\Editor\Sequencer\Private\Sequencer.cpp:815]
LogWindows: Error: [Callstack] 0x00007ffcb1555449 UE4Editor-UnrealEd.dll!FTickableEditorObject::TickObjects() [G:\UE4_27\Engine\Source\Editor\UnrealEd\Public\TickableEditorObject.h:45]
LogWindows: Error: [Callstack] 0x00007ffcb196e318 UE4Editor-UnrealEd.dll!UEditorEngine::Tick() [G:\UE4_27\Engine\Source\Editor\UnrealEd\Private\EditorEngine.cpp:1502]
LogWindows: Error: [Callstack] 0x00007ffcb22706e6 UE4Editor-UnrealEd.dll!UUnrealEdEngine::Tick() [G:\UE4_27\Engine\Source\Editor\UnrealEd\Private\UnrealEdEngine.cpp:426]
LogWindows: Error: [Callstack] 0x00007ff7ea2a87a0 UE4Editor.exe!FEngineLoop::Tick() [G:\UE4_27\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:4922]
LogWindows: Error: [Callstack] 0x00007ff7ea2c0fbc UE4Editor.exe!GuardedMain() [G:\UE4_27\Engine\Source\Runtime\Launch\Private\Launch.cpp:178]
LogWindows: Error: [Callstack] 0x00007ff7ea2c10aa UE4Editor.exe!GuardedMainWrapper() [G:\UE4_27\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137]
LogWindows: Error: [Callstack] 0x00007ff7ea2c40cd UE4Editor.exe!LaunchWindowsStartup() [G:\UE4_27\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:273]
LogWindows: Error: [Callstack] 0x00007ff7ea2d5984 UE4Editor.exe!WinMain() [G:\UE4_27\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:320]
LogWindows: Error: [Callstack] 0x00007ff7ea2d853a UE4Editor.exe!__scrt_common_main_seh() [d:\agent\_work\5\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
LogWindows: Error: [Callstack] 0x00007ffda4047034 KERNEL32.DLL!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ffda5a82651 ntdll.dll!UnknownFunction []
LogWindows: Error:

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Fixed

Component	UE - Anim - Sequencer
Affects Versions	4.27
Target Fix	4.27.2

Fix Commit	17862897
Main Commit	17874281
Release Commit	17862897

Created	Oct 18, 2021
Resolved	Oct 19, 2021
Updated	Dec 1, 2022

View Jira Issue

UE-131975

Sequencer crashes when using Transform variable added to Scene component BP

Sequencer crashes when using Transform variable added to Scene component BP

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