Unreal Engine Issues

FAsyncIOSystemBase::QueueDestroyHandleRequest fatal error crash on launch or package

Fatal error due to FAsyncIOSystemBase::QueueDestroyHandleRequest during launching and packaging projects. May be linked to: [Link Removed] ...

Crash using Find in Content Browser with -d3ddebug command

Crash occurs when using the Find in Content Browser option in the World Outliner. This only occurs when using the -d3ddebug command. If I don't use it, everything works with no crash. ...

BP class variables aren't created for component templates not loaded in an uncooked server build due to component class NeedsLoadForServer() API override.

See UDN thread for details. Essentially we need to ensure that class variables are created for SCS components even if the template isn't loaded as a result of a NeedsLoadForServer() API override. O ...

Crash when importing Alembic files as Skeletal Mesh

[CrashReport] Assertion failed: !Export.ClassIndex.IsNull() | UPackage::Save()

This is a somewhat common crash coming out of the 4.17 release. User Descriptionsclicked Launch->Firefox. This is the same project with in-game video-screens which has been crashing on Launch for W ...

Crash after switching materials on a particle system mesh and saving the mesh

The repro steps are very similar to https://jira.ol.epicgames.net/browse/UE-34241 except that you have to save the static mesh before switching back to the particle editor. ...

[CrashReport] UE4Editor_Engine!TOctree<TVolumeLightingSample<3>,FLightVolumeOctreeSemantics>::TConstElementBoxIterator<TInlineAllocator<99,FDefaultAllocator> >::ProcessChildren() [genericoctree.h:613]

This is one of the top crashes in the 4.14 Preview being submitted by the community. No additional information regarding this crash is currently available. ...

Level Sequences in Level Instances

Workaround is to specify Binding Overrides on the LevelSequenceActor through its Details panel as such (while editing the LI). ...

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. ...

Crash opening ContentExamples with the -d3ddebug command

Editor is crashing when opening ContentExamples with the -d3ddebug command line argument ...