Unreal Engine Issues
Unreal Engine Issues
Save process fails for BuiltData.uassets when trying to PIE - Standalone Game
Tools - Jul 10, 2017The following can be observed in the output log for the various BuiltData.uassets:Cmd: OBJ SAVEPACKAGE PACKAGE="/Game/Maps/Highrise_Audio_BuiltData" FILE="../../../../../Builds/Release-4.17/Samples/ ...
Missing UV Clamping or Clear in SunAlphaPS_Mobile
UE - Platform - Mobile - Nov 13, 2025In: void SunAlphaPS_Mobile( float2 InUVs[8] : TEXCOORD0, in FStereoPSInput StereoInput, out HALF_TYPE OutColor : SV_Target0 ) { OutColor = SunUnBias(SunShaftAndDofTexture.Sample(SunShaftAndDo ...
Gameplay Tags with the string "None" as any of its hierarchical node identifiers behave incorrectly (because of an incomplete generated FGameplayTagContainer::ParentTags array)
UE - Gameplay - Nov 19, 2024Currently, using the string "None" as a hierarchical node identifier inside a Gameplay Tag (for example "A.B.C.None.D.E.F") is not disallowed by the engine, but results in some incorrect behaviors. ...
[CrashReport] UE4Editor_CoreUObject!UObjectBaseUtility::GetOutermost() [uobjectbaseutility.cpp:118]
Tools - Sep 8, 2016This Jira was created from CrashReports submitted by the public due to the high number of occurrences. User DescriptionsSwitching levels, then when prompted to save current unsaved level, selecting ...
[CrashReport] UE4Editor_SlateCore!SWidget::SlatePrepass() [swidget.cpp:493]
Tools - Dec 1, 2017This is a common crash in the 4.18 release. The callstack is rather generic, and I have attached two logs but neither displays the error information. Users have also not provided any descriptions ...
DataTable asset view runs out of (video) memory
UE - Editor - UI Systems - Slate - Feb 26, 2024In some situation, Slate tries to secure incredible amount size data and run out of memory. This happens a cell having very long and complex serialized text appears on the editor and it is placed to ...
Crash when manipulating Bone Space IK before setting EffectorSpaceBoneName
UE - Anim - Rigging - Feb 9, 2017Error message: Assertion failed: Pose.IsValidIndex(BoneIndex) [Link Removed] [Line: 528] Source Context: 513 const FTransform& ParentTransform = GetComponentSpaceTransform(ParentIndex); ...
Translucent materials in the PostMotionBlur pass can cause a flickering viewport artefact when using TAA
UE - Graphics Features - Feb 5, 2025There appears to be a bug relating to rendering multiple windows that can trigger under unknown circumstances. It has been reported on rectangle lights in the forums and on PostMotionBlur materials ...
FIXIF: Using the Merge Blueprints feature crashes the editor
UE - Gameplay - Blueprint - Feb 18, 2015Using the Merge Blueprints feature crashes the editor. This repro is for clicking between the error and warnings while merging, but the editor will generally crash if the Merge is finished or if an ...
Properties not serialized when moving actor/component depending on unrelated specifiers
UE - Framework - Blueprint - Sep 25, 2023When an actor is moved on the level editor viewport, it is reconstructed along with its components, which at first makes their properties reset to their default state. Thankfully, this does not happ ...