An imported file that resides within the project's folders gets a relative path. That path is not updated it you copy the uasset to another folder. That breaks the Reimporting functionality.

UE - Editor - Content Pipeline - Aug 28, 2024

An imported file that resides within the project's folders gets a relative path. That path is not updated it you copy the uasset to another folder, so from the location of the new asset's the relati ...

Projects are failing when Content/Pak folders are added outside of the saved folder

UE - Platform - Mobile - Oct 13, 2016

When the Content/Pak file is outside of the Saved Folder, it'll crash with an internationalization error. But when the Content/Pak file is inside of the Saved folder, there is not a crash. ...

Crash when adding Actor Array Element to a Sequencer Event Struct

UE - Anim - Sequencer - May 25, 2017

Crash when adding Actor Array Element to a Sequencer Event Struct Error message: Assertion failed: 0 [Link Removed] [Line: 56] Source Context: 42 N = FName(*StringName); 43 ...

AI Pawn Sensing component cannot see and hear at the same time

UE - AI - Mar 12, 2015

Hear events are never fired while See events are fired. They are mutually exclusive, with See events taking priority if both happen. ...

Editing a blueprint from a hidden streamed level can reset all actor transforms

UE - Gameplay - Blueprint - Jul 9, 2015

When editing an actor blueprint that's inside of a hidden streamed level, the blueprint actor transform will reset to 0,0,0. There is a video that's attached to the AnswerHub post which is very use ...

LevelEditor: "Replace Actor" marks level as dirty even when using external actors

UE - World Creation - Worldbuilding Tools - Jul 15, 2024

When using external actors, adding/removing/replacing/editing an actor instance inside a level does not cause any modification to the Level package, which helps reduce contention for the map file on ...

ISM + WPO = broken motion vectors?

UE - Graphics Features - Nov 5, 2024

Instanced Static Meshes will have incorrect velocity if a Material uses World Position Offset. Fixed WPO in a material causes significant velocity on the ISM. This was also replicated in //UE5/Rele ...

[CrashReport] UE4Editor_Slate!TAttribute<FText>::Get() [attribute.h:130]

UE - Editor - UI Systems - Slate - Jul 13, 2017

This is a common crash affecting users in 4.16 User DescriptionsI imported an FBX and the editor crashed.alembic import from brekelwhats wrong with the ue4 alembic importer? Source Context 120 ...

Reimporting static mesh doesn't respect changed lightmap settings

UE - Editor - Content Pipeline - Import and Export - May 11, 2023

Licensee reports change of behaviour between UE4 and UE5 when reimporting a mesh after changing its lightmap build settings. Change of behaviour occurred in 17404767, which was to fix a similar pro ...

Editor crashes on blueprint open when shortcut key is implemented through code

UE - Gameplay - Jun 7, 2017

Editor crashes on blueprint open when shortcut key is implemented through code inside of the BaseEditorPerProjectUserSettings.ini. Code used in repro is directly from Jeff W suggestion in the forum ...