STAT_AI_BehaviorTree_InstanceMemory is sometimes wildly inaccurate

UE - AI - Jun 10, 2020

From the UDN thread: Turns out this is caused by the way this stat was implemented for the FBehaviorTreeInstance struct: 1) You call IncMemoryStats on construct, before the struct is populated with ...

Crash on startup with a Blueprint deriving from an abstract class with a SpriteComponent

Tools - Feb 7, 2018

Appears to be an issue with load order and the timing of when we populate the 'ShowSpriteCommands' and 'SpriteIDToIndexMap' containers, which we assert on if they're not the same size. The original ...

The Unreal Engine building dialog either does not appear or is only visible for a brief second

UE - Virtual Production - Nov 18, 2022

This is not a regression against 5.0. Tested in //UE5/Release-5.0 CL20979098 However, as users have pointed out, this is a departure from UE4. The same process in 4.27.2 demonstrates the building d ...

Actor Soft Reference in LevelInstance does not have a Referenced Object during PIE

UE - World Creation - Worldbuilding Tools - Level Instances - May 30, 2023

When setting an actor on a level to the SoftObjectRefence(Type:Actor) variable and outputting the object name as a PrintString, the object name cannot be correctly obtained if the set actor is place ...

Target Points are changing locations within World Partition Maps Shipping Build

UE - World Creation - Worldbuilding Tools - World Partition - Sep 19, 2023

Target Point Actors are changing location when in a World Partition Map within a Shipping Build. This does not occur in Non World Partition Maps. The name of the Asset also changes when in a World ...

[CrashReport][GPU Crash] NodeAndClusterCull

UE - Graphics Features - Nanite - Nov 19, 2024

Users affected: 51 Total occurrences: 90 Last occurrence: November 19th 2024, 3:25:41 am First occurrence: August 7th 2024, 8:10:10 pm Latest version: ++UE5+Release-5.5-CL-37670630 Platform: Win64 [ ...

Crash When Opening a DataTable Based Off a Struct With a Timecode Variable

UE - Anim - Sequencer - Mar 30, 2020

When a datatable is based off a struct with a timecode variable it will crash when opening. Found in 4.24.3 CL#11590370 Reproduced in 4.23.1 CL#9631420, 4.25 Preview 4 CL#12366721, 4.26 CL#12123513 ...

MAC: UE4 Editor crashes in gldReadTextureData on Nvidia 330M

UE - Platform - Apple - Dec 15, 2014

A user is reporting semi-regular crashes on his MBP 6,2, with Nvidia 330M GPU. This is a GL 3.3 GPU which we don't routinely test against, he may have the 256 or 512MB model, but this is unclear. T ...

Macro Library tries to recompile upon PIE when Auto Recompile is turned off and library does not need to be recompiled

UE - Gameplay - Blueprint - May 11, 2016

Macro Library tries to recompile upon PIE when Auto Recompile is turned off and library does not need to be recompiled. Note The macro library does not have to be used to cause the compilation mes ...

Cannot manipulate morph targets unique to Slave Component through Master Component

OLD - Anim - Apr 1, 2016

Cannot manipulate morph targets that are unique to the Slave Component through the Master Component. So the situation here is that the Head(Master) does not have the "BeerBelly" morph target, but t ...