"Assertion failed: NumberOfFreeBits >= 0" on clients that attempt to connect to a server with the -NoPacketHandler option

UE - Networking - Oct 6, 2020

With the rework of IP address resolution in 4.25, this assert now occurs. When no packet handler is used, UPendingNetGame::InitNetDriver calls SendInitialJoin() immediately, before async address res ...

Exporting to FBx nanite staticmesh, export the low res fallback LOD 0

UE - Editor - Content Pipeline - Import and Export - Dec 7, 2022

The exporter export the render data and the nanite render data is on the gpu and is not accessible, this is why it export the fallback mesh. Its more complex then it appear since we will need to do ...

Importing a 16x16km landscape at 0.5m resolution crashes Unreal (not enough VRAM)

UE - Graphics Tools - Terrain - Landscape - Jan 9, 2023

[CrashReport] Crash on FMaterialEditor::OnCanPromoteToParameter()

UE - Rendering Architecture - Materials - Jun 22, 2017

This is a common crash in the 4.16 release (affecting Windows and Mac). A log file is attached. Users have not provided descriptions so additional information is not currently available. Windows C ...

[CrashReport]UnrealEditor-Chaos!Chaos::TEventContainer<Chaos::FCollisionEventData>::DispatchConsumerData() [EventManager.h:214]

UE - Simulation - Physics - Mar 14, 2022

Generated from CrashReporter Error Messages:Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 691] Array ind ...

[Bug] 4.7.0 preview 5: Cannot add events for the main component of the SkeletalMeshActor

UE - Gameplay - Blueprint - Feb 9, 2015

In UE4.7 Preview 5, cannot add events for the main component of the SkeletalMeshActor. (see screenshot.) ...

Importing a t3d filetype will cause a crash

UE - Editor - Content Pipeline - Import and Export - Jun 15, 2016

!!! Changes between version 4.12 and 4.13 for importing these !!! 4.12 There is a crash when importing any t3d (legacy) file through File > Import Into Level using the t3d file option. 4.13 The ...

Timing appears to be different for the first call of tick

UE - Gameplay - Nov 30, 2016

Timing appears to be different for the first call of tick causing the camera to appear in a different area than what it was in 4.13 This issue appears to be a regression ...

When using the draw text node On paint setting the position appears to have no effect

UE - Editor - UI Systems - Dec 7, 2015

If the user uses the on paint function in combination with the draw text node then the text appears to only at the position 0,0 regardless of what position is specified. ...

ContentExamples PostProcessing map demo 1.13 post process volume screen percentage is not low enough

Docs - Samples - Aug 19, 2016

The post process volume in ContentExamples for Screen Percentage is set to 90 which is too high to notice a difference. The documentation has it at 25 here: https://docs.unrealengine.com/latest/INT/ ...