Option "Use Mouse for Touch" does not work correctly when running the game in "Standalone" or "New Editor Window (PIE)" modes: Virtual joystick does not appear and mouse cursor is incorrectly hidden while captured.

UE - Gameplay - Input - Apr 1, 2025

The Editor provides option "Project Settings – Engine – Input – Mouse Properties – Advanced – Use Mouse for Touch" to allow testing virtual joysticks and other touch controls with the mouse. When ru ...

Crash occurs while changing between FK/IK mode in Animation Mode on the same frame with Space changing

UE - Anim - Anim in Engine - Jul 11, 2022

Crash occurs while changing between FK/IK mode in Animation Mode on the same frame with Space changing. ...

[CrashReport][Crash] UnrealEditor-Core!IMemoryReadStream::CopyTo()

UE - Rendering Architecture - Apr 10, 2025

Intermittent crash in virtual texture transcode. Usually mempy from nullptr but also occasionally we see the same callstack with memcpy to random location. ...

[CrashReport] UE4Editor_MovieSceneTools!FPropertySection::GetPropertyValue<float>() [propertysection.h:70]

UE - Anim - Sequencer - Sep 20, 2017

This is a somewhat common crash in 4.17. Users have not provided any descriptions of their actions when the crash occurred. Source Context 58 /** Gets the current value of the property w ...

Spline mesh crashing in FRayTracingDynamicGeometryCollection::AddDynamicMeshBatchForGeometryUpdate

UE - Graphics Features - Ray Tracing - Jan 31, 2025

A crash occurs when using ray tracing with spline meshes preceded by the following ensure : Ensure condition failed: NumCPUVertices <= VertexBufferNumElements  File: Engine\Source\Runtime\Renderer\ ...

[CrashReport] UE4Editor_CoreUObject!StaticAllocateObject() [uobjectglobals.cpp:2305]

UE - Gameplay - Jan 24, 2018

Comments from users:I was simply syncing my project with the git repository at the end of it, it crashed with this errorperforce resync ...

[CrashReport] UE4Editor_Kismet!FBlueprintEditorToolbar::GetStatusImage() [sblueprinteditortoolbar.cpp:669]

UE - Gameplay - Blueprint Editor - Aug 15, 2017

This is a trending crash coming out of the 4.17 release. Users have not provided descriptions of their actions when the crash occurred. Source Context 658 switch (Status) 659 { ...

Crash on Check Always Create Physics State on Simulated Skeletal Mesh

UE - Gameplay - Components - Jun 25, 2015

When you place a Skeletal Mesh using a Simulated Physics Asset into a Blueprint, check Always create a Physics State and Save BP, crash. [Link Removed] Also reproduced in Main Promotable-CL-259954 ...