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 ...
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 ...
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 ...
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 ...
FBX Import for Skeletal Meshes normals not correct
UE - Graphics Features - Jan 12, 2016When importing a mesh as skeletal mesh and using any of the MikkTSpace or option to "Import Normals and Tangents" will cause the normals to import incorrectly. If using the Compute Normals or Import ...
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 ...
Adjusting color picker value for color structs within a structure crashes editor
UE - Gameplay - Blueprint - Aug 1, 2016Attempting to adjust the value of a color struct via the color picker in structures crashes the editor. Frequency: 3/3 CrashReporter: [Link Removed] Regression (Yes) issue (does not) occur in 4. ...
Memory Leak When Hovering Over a Folder Containing Blueprints
UE - Editor - Content Pipeline - Content Browser - Jun 7, 2016Hovering the mouse cursor inside a Content Browser folder that contains blueprints causes the memory usage to steadily increase. This only seems to occur with blueprint assets in the folder. A use ...
Foliage instances are not included when exporting a scene to FBX
UE - World Creation - Worldbuilding Tools - Foliage - Aug 4, 2016When exporting Foliage instances to FBX the FBX will not contain any of the foliage instances, but will include any other static or movable geometry. This is a regression. This worked in 4.11.2 but ...
[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 ...