Unreal Engine Issues
Unreal Engine Issues
UFE Deploying and launching a packaged build on Linux fails due to invalid directory
UE - Platform - Linux - Dec 22, 2016Deploying and launching a packaged project, using a Custom Launch Profile that is set to copy the project to a repository, fails due to a missing /. I do not see this issue when running a Quick Lau ...
[CrashReport] UE4Editor-Renderer.dylib!FSceneRenderTargets::GetGBufferResourcesUniformBuffer()
UE - Graphics Features - Jul 20, 2017This is a common crash affecting Mac users on 4.15 and 4.16 User Descriptionswhen i activate the blur effect of chameleon plugin. From LogAssertion failed: Assertion failed: IsValidRef(GBufferReso ...
[AI] Navmesh does not generate correctly on a plane that has a slope of 45 degrees or more.
UE - Runtime - Character - Sep 23, 2022Navmesh generation appears to have issues handling terrain and planes that are at 45 degree or steeper angles even if the agent max slope is set to allow for such movement. While the issue occurs at ...
[CrashReport] <unknown module>!UE4Editor_Core!FDebug::AssertFailed()
UE - Foundation - Core - Mar 28, 2016Error message: Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 678] Array index out of bounds: 0 from an array of size 0 Source Context: 80 } 81 else ...
[CrashReport] UE4Editor_Engine!UMaterialInstance::SetParentInternal() [materialinstance.cpp:2141]
UE - LD & Modeling - Terrain - Landscape - Aug 18, 2016This JIRA is being entered as a result of this being one of the top crashes in 4.13 Preview 2 Error message: Access violation - code c0000005 (first/second chance not available) Source Context: 2 ...
Destructible attached with a Physics Constraint have inconsistent physics
UE - Simulation - Physics - Destruction - Jul 26, 2016Destructible attached with a Physics Constraint have inconsistent physics compared to a standard Static Mesh. This is also sometimes prevalent with Destructibles that aren't attached with a Physics ...
changing localization does not change text in PIE
Tools - Sep 10, 2015When switching localization for testing, text does not change language in PIE. ...
Crash on loading some MovementAnimSetPro Blendspaces
OLD - Anim - Dec 21, 2016Error message: Assertion failed: TrianglesMade==2 [Link Removed] [Line: 373] Source Context: 360 { 361 FTriangle NewTriangle(A->Vertices[1],A->Vertices[2], TestPt); 362 ...
Hardware Lumen Surface Cache Artifacts on Nanite Geometry
UE - Graphics Features - Lumen - Sep 1, 2025When using Hardware Lumen with Nanite-enabled meshes in UE 5.6+, black / dark surface cache artifacts appear that result in generally darker and unstable lighting. These artifacts are not immediatel ...
CommonListView EntryWidgetClass allows invalid assignment via “Use Selected Asset From Content Browser”
UE - AI Workflows - UI Systems - Jan 6, 2026CommonListView requires its EntryWidgetClass to implement UserObjectListEntry. This requirement is correctly enforced by the Entry Widget Class dropdown, which filters out widgets that only implemen ...