Unreal Engine Issues
Unreal Engine Issues
Creating an AnimStreamable asset immediately crashes the editor
UE - Anim - Runtime - Feb 6, 2024When creating an anim streamable we immediately fail a check in the compression code in FCompressibleAnimData::FetchData: checkf(AnimSequence, TEXT("Invalid animation sequence while trying to fetc ...
Editor crash while saving asset during cook operation
UE - Foundation - Data Pipeline - Cooker - Apr 2, 2025It is possible to experience an editor crash in 5.5.4 when the cook process generates a warning that references an asset while the editor is saving. It seems that during a save operation, the code t ...
Moving folder of assets crashes editor
UE - Simulation - Physics - Dec 23, 2015Moving the contents folder for the Dynamic Clocks marketplace asset crashes the editor immediately. Frequency: 5/5 CrashReporter: [Link Removed] ...
Blueprint - Crash when a function takes an event as a parameter
UE - Gameplay - Blueprint - Oct 10, 2016Looks like maybe we aren't replacing the source delegate function (SignatureFunction) reference on the UDelegateProperty after recompiling the class - the function's owner name has the TRASHCLASS pr ...
Blueprint Function Library functions created in the Content Browser cannot be used in Object derived Blueprint classes
UE - Gameplay - Blueprint - Nov 13, 2015I was noticing that functions you define in a Blueprint Function Library created in the content browser are only usable from blueprint classes that derive from Actor, but not from blueprint classes ...
Crash in persona editor when set postprocess animinstance using Linked Layer Anim to skeletal mesh
UE - Anim - Runtime - Anim Blueprints - Aug 29, 2023Crash when set PostProcessAnimBlueprint in persona editor. Related to [Link Removed], [Link Removed]. ...
Crash when save the blueprint function variable that set the StringTable asset
UE - Foundation - Core - Apr 17, 2019This issue doesn't crash in 4.21. It is rewritten as GIsSavingPackage = true in UPackage::(Save() when Blueprint is saved, but it's rewritten as false in 4.21. Workaround Do not set the String Tab ...
Spawnable Level Instance via Sequencer in WP map
UE - World Creation - Worldbuilding Tools - Level Instances - Aug 21, 2023ULevelInstanceSubsystem::OnActorDeleted: check(!IsEditingLevelInstanceDirty(LevelInstance) && !HasDirtyChildrenLevelInstances(LevelInstance)); ...
Crash Occurs When Generated Item Type Doesn't Match Return Type
UE - AI - Jan 7, 2016After creating the example generator that is displayed at the bottom of the documentation linked below, a crash will occur if the Generated Item Type is set to EnvQueryItemType_Actor (which is the d ...
Unable to save Blueprint Function Library if it references a string table entry
UE - Editor - UI Systems - Localization - Apr 4, 2019Regression. Function library saving crashes if it references to a string table entry. ...