Rearranging the position of enumerators in an Enum BP will change references to the enumerators inside Data Tables based on position rather than value

Tools - Nov 12, 2015

Rearranging the position of enumerators in an Enum BP will change references to the enumerators inside Data Tables based on position rather than value. Reproduced in 4.8.3 binary, 4.9.2 binary, 4.1 ...

Cvars sections in Sequencer behaving incorrectly when using MRQ

UE - Virtual Production - Tools - MRQ - Aug 9, 2023

Some key lines in the code:Engine\Source\Runtime\MovieSceneTracks\Private\TrackInstances\MovieSceneCVarTrackInstance.cpp:177 --> Apply   CVar when entering sectionEngine\Source\Runtime\MovieSceneTra ...

Blueprints not marked dirty when variables in referenced actors are renamed

UE - Gameplay - Blueprint Compiler - Feb 20, 2018

Blueprints using renamed variable do not indicate that they need to be recompiled. (However errors are shown on play) It is possible to not see an error if you add a variable with the same name as ...

iOS/tvOS fails to build from source editor built with Xcode 9.3, macro expansion producing 'defined' has undefined behavior

UE - Platform - Mobile - Apr 2, 2018

Trying to launch on or package for TVOS or iOS from a source build of Mac or Windows will fail with errors:[2018.04.02-16.35.08:522][634]LogPlayLevel: In file included from /Volumes/Storage/GitHub ...

[CrashReport] UE4Editor_LevelEditor!SLevelViewport::BindShowCommands() [slevelviewport.cpp:1429]

Tools - Nov 10, 2017

This is a longstanding but infrequent crash that has occurred since at least 4.16.1. Users have not provided any descriptions of their actions when the crash occurred. The callstack closely matche ...

[CrashReport] UE4Editor_Core!FText::IsEmpty() [text.cpp:230]

Tools - Apr 6, 2016

This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Error message: Assertion failed: Index >= 0 [Link Removed] [Line: 401] Source Context: 215 ...

"FVector contains NaN" on packaged builds for Debug configuration

UE - Graphics Features - Lumen - May 6, 2022

Customer Provided Description:This was experienced in UE 5.01 - custom installed engine (No changes to UE code, simply added the Debug build configuration, see the following command): "c:%ue_dire ...

ToggleDebugCamera Console Command doesn't disable an enabled DebugCamera

UE - Gameplay - Aug 5, 2019

The "DisableDebugCamera" node and the "ExecuteConsoleCommand" node with "ToggleDebugCamera" in the Command field do not disable an enabled Debug Camera. Found in 4.22.3 CL#7053642 Reproduced in 4.2 ...

Editor Crashes When Reparenting a Trigger Sphere to a Trigger Capsule

UE - Simulation - Physics - Aug 15, 2016

Reparenting a blueprint derived from Trigger Sphere to Trigger Capsule will cause the editor to crash. This is a regression. This did not occur in 4.11.2. Source Context: 163 164 ...

[CrashReport] UE4Editor_Slate!SMultiBoxWidget::GetCustomizationVisibility() [multibox.cpp:931]

Tools - Jun 14, 2016

This 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: Result == FPrope ...