Unreal Engine Issues

Crash when importing an Alembic file with Materials as a different asset type than one that already exists

This will occur when changing between all Import Types (so long as Create Materials is checked). The callstacks are slightly different depending on which Import Type you switch to. [Link Removed] ...

ODSC - Launching a newly created project via UnrealFrontend fails to load some materials and crashes

The same repro steps on 4.26.2 will launch the project successfully. Packaging a project once to create complete ShaderMaps will work around the issue. ...

Crash after enabling iOS Metal Desktop Renderering and then enabling iOS SM5 Preview Rendering Level

IOStore : Packaged game crashes when doing garbage collection right after cancelling async loading by UnloadPrimaryAssetList

Packaged game without IOStore never hits this error. ...

Crash on PIE exit after dynamically enabling and disabling tick functions through the Level Script blueprint.

User reports hitting an assertion due to invalid FTickTaskManager state when game is attempting to unregister a tick function that was previously disabled dynamically. Failed assertion is in FTickT ...

Crash when adding a spawnable volume to a Level Sequence when Draw Brush Polys is enabled in the level editor

Visualization View Mode Shader Complexity when in Mobile Preview Vulkan with MMV will crash the editor

Material Editor Crash occurs on mathematical operation node receiving invalid input from a Texture Object

Crash after setting a key on a Rotation Track, then trying to right click the key with Transform track collapsed

Error message: Access violation - code c0000005 (first/second chance not available) Source Context: 336 337 if (bHasRotationKeys) 338 { 339 TSharedRef<FStru ...

Crash on packaged game. 4.23 will not nativize a class that creates instanced properties inside itself

Description from the user: up to 4.23 properties nativize normally if they are written in C++ with the Instanced specifier. The discerning difference is that that there was no Blueprint Class itsel ...