Unreal Engine Issues
Unreal Engine Issues
Cast enum to byte could occasionally break cook/resave in level BP
UE - Gameplay - Blueprint Compiler - Aug 27, 2020Workaround:The blueprint macro had a cast from the enum to an int and that was causing the issue, getting rid of the cast and just returning the enum and then changing all the places that were usin ...
Inherited AnimBP properties not always working across editor restarts
OLD - Anim - Jan 21, 2016In 4.11 when making changes to node properties in an animation blueprint they will not always appear to update in child blueprint instances when restarting the editor. In the attached project the l ...
Duplicating / Moving (to another level) an actor with a Hierarchical Instanced Static Mesh component causes a crash
UE - Graphics Features - Nov 14, 2016When you have an actor with a Hierarchical Instanced Static Mesh component that has a Static Mesh set and is populated with at least 1 instance and then duplicate it or move it to another level, it ...
Uniform scaling in the viewport not working as expected when additive mode is enabled
UE - Editor - Workflow Systems - Apr 2, 2022The uniform scaling does not work as expected Repro Steps: 1) Add a cube to a level 2) Set the scale (X = 16, Y=9, Z=9) 3) Click the Lock icon to activate the Uniform Scale feature 4) In the viewpor ...
Importing static mesh while a PIE session is running permanently breaks nanite on the asset
UE - Editor - Content Pipeline - Import and Export - Mar 12, 2025Importing a Static Mesh during PIE can cause it to never enable Nanite, even if it reports that Nanite is enabled. To re-enable Nanite on the mesh, the asset needs to be deleted and imported again ...
Volumetric Translucent Shadows will only work if you select the mesh, doesn't show up in game
UE - Graphics Features - Aug 18, 2015When using Volumetric Translucent Shadows for static meshes the shadows will only work if the mesh is selected. When the mesh is deselected it will not render. This worked in 4.8.3, but is broken ...
Building for Gear VR Distribution fails due to missing Oculus lib
UE - Platform - XR - Jun 7, 2017Users have reported that building for Distribution on Gear VR results in failure due to a missing Oculus library. The error they receive is as follows: UATHelper: Packaging (Android (ETC2)): [javac ...
Behavior Trees cannot be saved if the Blackboard assigned to it was opened before opening the Behavior Tree from the Content Browser
UE - AI - Nov 2, 2015Behavior Trees cannot be saved if the Blackboard assigned to it was opened before opening the Behavior Tree from the Content Browser. Reproduced in 4.8.3 binary, 4.9.2 binary, 4.10 Preview 3 binary ...
Displaying Revision control history for a file ending in an "undo" of a revision can cause a crash
UE - Editor - Workflow Systems - Jun 18, 2024This crash is caused by how source control history is managed and shown. In this specific case the source control software is Perforce. As written in the repro steps, it can happen to any uasset tha ...
[CrashReport] UE4Editor_BlueprintGraph!BlueprintActionFilterImpl::IsEventUnimplementable() [blueprintactionfilter.cpp:588]
UE - Gameplay - Blueprint - Jun 1, 2016This crash has been reported through the 4.12 Previews and is continuing to occur in the 4.12.0 release. Additional information about this crash is not available at this time, however it may be the ...