Unreal Engine Issues

4.6 Delegate error in Blueprints

When looking into the bd_hud_scoring and bd_rules_maze blueprints in the users project (Provided below), there are nodes that are throwing errors. If you press compile, the errors go away and the co ...

Pasting nodes into level blueprint crashes editor

Level sequence updates more than once per frame when content editors are open

When content editors are open, they cause sequencer to be updated more than once per frame. This causes animations running in PIE to play faster than expected. Licensee provides code for a potential ...

Blueprint Implementable Events and Event dispatchers with the same name break the event dispatcher.

Creating an event dispatcher and BlueprintImplementableEvent function with the same names causes a signature conflict inside the blueprint. The event dispatcher is then broken as it cannot be delet ...

REGRESSION: HierarchicalInstancedStaticMeshComponent LOD transitions are broken in 4.9 and Main

While testing another fix I noticed HISM LOD transitions are not working in Main or 4.9 branch. There is no screen-door effect and multiple LODs seem to be rendering simultaneously compared to 4.8. ...

UnrealBuildTool fails to build generate project files or build if the project is stored on a non-HFS partition

When a user attempts to compile a project that is stored on a non-HFS partition on OSX, UBT fails to build due to files that are being generated that start with ".". The user's proposed fix is to ha ...

Ensure When Setting Simulate Physics of a Child Actor on the Server and Forcing NetUpdate

An ensure is being triggered when you set simulate physics on a child actor on the server and then force net update. Found in 4.14.2 CL# 3241561. Reproduced in 4.16 Main CL#3247538 ...

FixupRedirects commandlet does not auto-commit deletions

See this UDN: https://udn.unrealengine.com/questions/297811/fixupredirects-commandlet-submitting-marked-for-de.html The fix looks straightforward, just a one-line change but could benefit from tes ...

GC Clustering broken for USoundWave assets (crash)

Assert crashes Editor in the GC system during packaging due to USoundWave assets not being configured for GC clustering. Disabling GC clustering in project settings is a workaround, but the fix is ...

Ensure when undoing the deletion of the RecastNavMesh - Top Down project

While testing in //UE4/Release-4.16 CL 3466753 in Binary – I encountered an ensure when undoing the deletion of the RecastNavMesh. Regression: No This issue also occurs in //UE4/Main and //UE4/Rele ...