Unreal Engine Issues

Instanced object in an array property of an actor component is invalidated and marked for garbage collection on undo

If an actor component contains a TArray of instanced objects, some of those object instances can get incorrectly invalidated and marked for garbage collection in certain situations, possibly resulti ...

Crash when moving map assets used as level instances

Crash on Importing specific Animation Only FBX

When importing the attached FBX file with only Animations, the editor will crash. The Same asset will import without error in 4.9.2 Crash Reporter BUGG: [Link Removed] ...

Crash Occurs When Deleting Virtual Bones that are Referenced in Post Process Anim Blueprint

When a post process anim Blueprint that uses a virtual bone is used in the Skeletal Mesh and the virtual bone is deleted from the skeleton, crash occurs -The Post Process Anim Blueprint is set in ...

Exporting and Importing Alembic File from Maya to Unreal Adds Extra Frame to Animation

When importing an Alembic file into Unreal Engine an extra frame is added automatically to the frame range in the import settings -abc file has been brought into Maya 2016 and exported again as an ...

[CrashReport] UE4Editor_UnrealEd!UEditorEngine::CheckForWorldGCLeaks()

This is a common crash occurring for users in 4.16. It is spread out among around 60 different CrashGroups in CrashReporter, because every case has a slightly different callstack. This appears to ...

Crash in persona editor when set postprocess animinstance using Linked Layer Anim to skeletal mesh

Crash when set PostProcessAnimBlueprint in persona editor. Related to [Link Removed], [Link Removed]. ...

Adding an LOD while in PIE or Simulate Cauases the Editor to Crash

If you add an LOD while the editor is simulating or playing, the Editor Crashes. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5660361, 4.23 CL# 6063286 ...

Animation Blueprint Editor Crashes on Compile if the Debug Instance Selection is Other Than No Object or Preview Instance

-Crash occurs when debug is set, and anim Blueprint is compiled while actor blueprint is selected -When reopening project, imported assets are no longer there -Reopening project after crash, the opt ...

When welding collision between Third Person UE4 Mannequin's left foot ball, to left foot in physics tab results in an Engine crash.

When using a Third Person UE4 Mannequin, Opening the Physics asset tab, and welding the collision between left foot ball, to left foot results in an Engine crash. Additional Note: Using the same ...