Unreal Engine Issues
Unreal Engine Issues
Expanding a macro with split struct pins causes internal compile errors
UE - Gameplay - Blueprint - Jul 27, 2017Expanding a macro that passes a struct with split struct pins to a function causes internal compile errors. Attaching sample project, can be recreated with steps above. ...
Copying a Folder in Sequencer and later Pasting it inside Sequencer is resulting in loss of Components
zComponent - Archive - Aug 8, 2025Copying a Folder in Sequencer and later Pasting it inside Sequencer is resulting in loss of Components. The pasted folder is not respecting the structure that was copied. This issue only happens on ...
Instances of Blueprints implemented native interface cannot be assigned to interface variables
UE - Framework - Blueprint - Oct 28, 2021FInterfaceProperty::SerializeItem (and ImportText) attempt to determine if the passed in object implements the interface in question. They do this by calling GetInterfaceAddress, which tries to get ...
GPU Crash in Niagara Fluids template when WorldSpaceSize has a component at 0
UE - Rendering - Architecture - Niagara - Apr 26, 2024The NiagaraFluids plugin provides several Niagara System templates to use as a starting point for the user's own Systems. The templates in category "3D Gas", such as "Grid 3D Gas Explosion", include ...
Special modifier key inputs do not register in editor if the key press occurs instantly
Tools - Mar 1, 2016Special function key presses and hotkey shortcuts do not register in the editor if they fire key presses instantaneously (0ms). In particular, TypeMatrix keyboards reproduce this error using keyboar ...
Rewind debugger would crash when recording a character using Pose search
UE - MVF Character - Animation - Aug 8, 2025Our character is using the Pose search setup from GameAnimation content example. The architecture of the system is most the same with some new function that account for some input difference and sp ...
[CrashReport] UE4Editor_Renderer!FSceneRenderTargets::GetGBufferResourcesUniformBuffer() [scenerendertargets.h:408]
UE - Graphics Features - Jan 18, 2016This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Assertion failed: IsValidRef(GBuff ...
Trigger Montage Ended Event results in Unhanded Exception
OLD - Anim - May 6, 2019TriggerMontageEndedEvent is calling RemoveAtSwap after the NotifyEnd callback which is not safe if the ActiveAninNotifyState array is modified by the callback. WorkAround: Add a Delay node befo ...
Irrelevant If Else call in ScriptCore.cpp
UE - Gameplay - Blueprint - Nov 3, 2016On line #1301 in ScriptCore.cpp, there is the following if statement:if (Function->FunctionFlags & FUNC_Native) { Function->Invoke(this, NewStack, ReturnValueAdress); } else { Fu ...
Packaging fails with too many instanced static meshes
UE - Graphics Features - Jun 8, 2018Project will fail to package with more than one actor containing ISM Components. From user: "...After some testing I found that it only occurs if there are multiple actors in a map (either of the ...