Unreal Engine Issues
Unreal Engine Issues
Crash rendering image sequence if the Sub-Level with matinee is not loaded
Tools - Apr 15, 2016Crash rendering image sequence if the Sub-Level containing the matinee is not loaded. This seems to go away if the level is either set to "Always Loaded". Seems to be a result of people not switch ...
[CrashReport] UE4Editor_Persona!FBoneDescription::SetScore() [bonemappinghelper.h:31]
OLD - Anim - Sep 14, 2017This is a somewhat common crash that appears to occur only in 4.17.1 (possible regression?). Users have not provided any description of their actions when the crash occurs. Source Context 20 ...
Saving Behavior Tree with Blueprint task inheriting from native class invalidates Blackboard key when BP contains a function
UE - AI - Jul 8, 2025A regression introduced in UE 5.6 causes Blackboard key selectors in Blueprint tasks to become invalid when the Blueprint inherits from a native subclass of UBTTask_MoveTo (or UBTTask_BlackboardBase ...
[CrashReport] Access Violation - UModelComponent::GetPhysicsTriMeshData() [modelcomponent.cpp:673]
UE - Simulation - Physics - Oct 2, 2017This is a trending crash coming out of the 4.18 Previews. Users have not provided any descriptions of their actions when the crash occurred. The callstack is similar to [Link Removed], which was ju ...
Crash when changing window resolution with AMD GPU, D3D11 and renderoffscreen
UE - Rendering Architecture - RHI - Apr 9, 2025Context A crash can be induced with running Unreal Engine with DirectX11, a AMD GPU and running -renderoffscreen flag, and the main window is resized. This issue was first observed with the PixelStre ...
[CrashReport] UE4Editor_Engine!FMeshMaterialShaderType::FinishCompileShader() [meshmaterialshader.cpp:121]
UE - Graphics Features - Dec 1, 2017This is a common and longstanding crash that has occurred since at least 4.11. However users have not provided any descriptions of their actions when the crash occurred. Source Context 107 ...
[CrashReport] UE4Editor_Engine!FAnimNotifyEvent::IsBranchingPoint() [animtypes.cpp:86]
OLD - Anim - Aug 29, 2017This is a common crash occurring in the 4.17 release. Users have not provided any descriptions of their actions when the crash occurred. Source Context 72 float FAnimNotifyEvent::GetDurati ...
Plugin module is not reloaded when a game module that depends on the plugin module is hot reloaded
UE - Foundation - Cpp Tools - Hot Reload - Jun 28, 2018Performing a hot reload after modifying game code (plugin code is unmodified) does not also reload plugin modules. In the attached project, there are some log messages output when the plugin module ...
Following the 'Working with Modular Characters - Skeletal Mesh Merge Example' results compilation errors
UE - Anim - Feb 10, 2022This is a Regression. Tested in: //UE5/Release-5.0 CL 18747223 GitHub //UE4/Release-4.27 CL 18319896 Binary The example can't be completed in UE5 as expected presumably because of a change within ...
Sampling textures with bias in the path of a custom data pin causes derivative operations when avoidable
UE - Rendering Architecture - Materials - Apr 8, 2025Materials that make use of the analytical derivatives path to avoid hardware derivatives can still generate derivative operations on texture samples when the shading model has a custom data pin and ...