Unreal Engine Issues

Alembic Geometry Cache crash with multiple meshes

Importing an Alembic geometry cache will cause a crash with multiple assets. Test asset attached that can reproduce this. When I tried with a couple of simple shapes from 3Ds Max I did not get the ...

[CrashReport] UE4Editor_SlateCore!SWidget::ExecuteActiveTimers() [swidget.cpp:986]

User comments:right mouse button in material editor made engine crash....becomes slow and crash....64gb ram, 2 xeon and gtx690....need to restart computer to everything works fine. need a solution t ...

check(!bPostTickComponentUpdate) fails triggered by UNiagaraComponent::CreateRenderState_Concurrent() and StaticMeshCompilingManager::FinishCompilation()

Reported alongside [Link Removed] Context: Some ActorComponents can schedule end-of-frame work which UWorld executes later in the frame in UWorld::SendAllEndOfFrameUpdates(). By-design it appears t ...

Spawned skeletal animations don't animate

Server crashes when client connects after Server has reloaded a sublevel with a deleted actor

UNetDriver::DestroyedStartupOrDormantActors maintains a list of deleted startup (and dormant) actors. This is used to notify clients that have joined the server of Actors that need to be destroyed ...

Sequential Level Loading in Python causes Crash

Loading all the levels selected in the Content Browser and running the aforementioned Python script causes the editor to crash Tested in 4.20.3 (CL - 4369336), 4.21.2 (CL - 4753647), 4.22 (CL - 5 ...

LIVE: Code projects using TextureRenderTarget2D will not build because UTextureRenderTarget is undefined in TextureRenderTarget2D

If a TextureRenderTarget2D is used in a code class, the build of the project will fail with an error stating that the UTextureRenderTarget base class is undefined. The line #include "Engine/TextureR ...

Client crash on seamless travel in DataReplication with lag

When server traveling, client may crash due to lag while attempting to replicate object/property. ...

Assertion failed: PlatformNeedsExtraDeletionLatency()

Animating a HISM along a spline when many other HISMs are present will result in a crash in 4.22. Confirmed in 4.23 MAIN @ CL 5291468 ...

Making changes to a Camera Shake while previewing the Camera Shake triggers a crash

This is not a regression. Tested in //UE4/Release-4.27 CL 18319896  Making changes to a Camera Shake while previewing the Camera Shake triggers an Assertion upon compiling. ...