Unreal Engine Issues

[PCG] Create PCG Asset from Level crashes on loaded sub-level exports

PCG Level Asset export doesn't support exporting a level while it is loaded as a sub-level. We should warn the user instead of crashing. ...

Crash on Package When Using Nativizing Animation Blueprint Has AnimGraph Connected with Enum

If an AnimNode connected with Enum and AnimBP is nativized, the package will occur crash. Following settings is solve this issue. [BlueprintNativizationSettings] +ExcludedBlueprintTypes=/Script/En ...

Crash when changing to Mesh LOD Coloration view mode with Paper2D sprites

Crash in the editor when changing the view mode. This occurs because of a nullptr dereference of "InMaterialInterface" in the FDebugViewModeMaterialProxy constructor (Line 32 in DebugViewModeMateri ...

Crash in NaniteStreamManager when Nanite data fails to decode corrupt data from DDC

If Nanite data becomes corrupt in the DDC, the Editor may crash in FStreamingManager::InstallReadyPages() when the Pending.State is FPendingPage::EState::DDC_Ready but the resulting SrcPtr is null b ...

Crash when importing some .skp files on MacOS

Light baking of a ton of static meshes causes Swarm to crash.

Light baking of a ton of static meshes causes Swarm to crash due to "Index was our of range". I confirmed that it can be reproduced with the sample project they sent us/ The error log I got is... ...

[CrashReport] Crash on Mac - UE4Editor-SlateCore.dylib!SWindow::IsVisible()

This is a common crash on Mac in the 4.16 release, and has occurred with low frequency since at least 4.11. Users have not provided any descriptions, so additional information is currently unknown. ...

Missing libomp140 DLL causing crashes in Hair Card Generator plugin

EA Motive has run into a crash when using the hair card generator plugin. A missing DLL is preventing them from creating hair cards according to the initial investigation from their engineers. More ...

Static Mesh cooking: Bad mesh description should not crash the cooker

FStaticMeshRenderData::Cache has the assertion: checkf(Owner->IsMeshDescriptionValid(0), TEXT("Bad MeshDescription on %s"), *GetPathNameSafe(Owner)); This assertion can be triggered by data erro ...

Passing an FQuat over a network will crash a game unless it is set as a variable first.

A user reported that retrieving and sending an FQuat over a network will crash a game unless the FQuat is first assigned to a variable and the variable is passed. ...