Unreal Engine Issues
Unreal Engine Issues
InPartialBunch can cause crash in FNetBitReader::CountMemory during memreport
UE - Networking - Nov 9, 2022An actor channel's InPartialBunch won't be deleted and cleared until a new partial bunch is received. This can result in a situation where memreport counts the memory for an old InPartialBunch and i ...
Dataprep crash when creating a parameter from a datatable asset or any asset
UE - Editor - Content Pipeline - Visual Dataprep - Nov 28, 2022FTabManager::FindPotentiallyClosedTab Crash Due to Invalid Array Indexing
UE - Editor - Workflow Systems - May 25, 2023As you can see from the above callstack it appears that calling RestoreArea can call FindPotentiallyClosedTab again higher in the stack, which can Remove() an entry from CollapsedDockAreas- this cau ...
Crash in ULandscapeComponent::UpdatePhysicalMaterialTask() during landscape sculpting undo operations
UE - Graphics Tools - Terrain - Landscape - Apr 11, 2024Using landscape sculpting tools, then executing Undo with Ctrl+Z ...
Crash when precaching PSOs for decals from non-game thread
UE - Rendering Architecture - Shaders - Aug 21, 2024During async loading from an AsyncLoading thread, DecalComponent attempts to precache PSOs which can trigger a checkf in StrongObjectPtr.h which are only allowed to be created on a game thread. ...
Editor crash when adding mesh renderer elements in Niagara
UE - Niagara - Jul 8, 2025When adding multiple meshes to a Niagara Mesh Renderer Module, a check() will be triggered due to a mismatch in the number of Widgets and the number of Tooltip Widgets. ...
Assertion failed: UnscaledViewRect.Width() > 0
Tools - May 23, 2018Crash when using new FCanvasDrawer Licencee notes that crash does not occur if "new FCanvasDrawer" is commented out. ...
ensure(false) being fired in FGenericParticlePairMidPhase::FindOrCreateConstraint from key collision
UE - Simulation - Physics - Jan 27, 2025ensure(false) being fired in FGenericParticlePairMidPhase::FindOrCreateConstraint from key collision. The licensee reports one of their users reported this issue and they were able to reproduce a fe ...
[CrashReport] UE4Editor_D3D11RHI!TerminateOnDeviceRemoved() [d3d11util.cpp:176]
UE - Graphics Features - Nov 18, 2016Error message: Fatal error: [Link Removed] [Line: 176] Unreal Engine is exiting due to D3D device being lost. (Error: 0x887A0006 - 'HUNG') Source Context: 161 162 const TCHAR* Rea ...
[CrashReport] UE4Editor_CoreUObject!IncrementalPurgeGarbage() [garbagecollection.cpp:1042]
UE - Editor - UI Systems - Localization - May 31, 2016This JIRA is being entered as a result of being one of the top crashes in 4.12 Preview 5 In the 4.12.0 release, we currently have a user on the Answerhub who experiences this crash: https://answers ...