Unreal Engine Issues
Unreal Engine Issues
Swarm Agent Binaries Missing in Launcher 5.7 Preview
UE - Foundation - Build - Rocket (Installed Engine) - Oct 23, 2025The Swarm binaries are missing from Engine\Binaries\DotNET in the 5.7 Preview launcher version of the engine. This causes any lighting build or precomputed static visibility builds to fails due to t ...
Visual Studio opens unnecessary windows when adding a new C++ class via the editor's interface
Tools - Oct 25, 2017When adding a new C++ class to a project via the editor's interface, Visual Studio is opened but it ends up opening more than is necessary. Firstly, Visual Studio is opened without focus on the two ...
[CrashReport] UE4Editor_LevelEditor!FMulticastDelegateBase<FWeakObjectPtr>::RemoveAll() [multicastdelegatebase.h:81]
Tools - Oct 26, 2017This is a trending crash in 4.18.0. One case of this callstack occurred in 4.17.1, but then numerous have occurred in 4.18. Users have not provided any descriptions of their actions when the crash ...
SetActorLabel resets components when run outside main editor process
Tools - Mar 30, 2015Calling SetActorLabel causes an actor's components to return to default states when called from a client accessing a listen server outside of main editor process. Note: User posted code linked to ...
[CrashReport] Crash on Mac due to uncaught exception 'NSRangeException' - HIToolbox!DispatchEventToHandlers()
UE - Platform - Apple - Jun 22, 2017This is a common and longstanding community crash on Mac. Users have not provided descriptions when they crash, so additional information is currently not available. A log file is attached. Call ...
StaticMeshComponents do not scale to negative value
Tools - Nov 22, 2016The scale of the component does not reach negative values like the instance of the object. However, the user is able to enter a negative number and the object correctly reflects that entered number. ...
Assets with Render in Main Pass disabled show shadow artifacts
UE - Graphics Features - Apr 18, 2016This issue was originally reported specifically for Destructibles, but it appears to affect Skeletal Meshes, and static meshes when selected. When "Render in Main Pass" has been disabled skeletal an ...
Linux Native Toolchain depends on libninfo5 which is not bundled
UE - Platform - Linux - Sep 6, 2019libtinfo.so.5 => /lib/x86_64-linux-gnu/libtinfo.so.5 (0x00007fc27cf4d000) bschaefer@bschaefer-Precision-T7600:bin$ ldd ./clang linux-vdso.so.1 => (0x00007ffceefe3000) libpthread.so.0 => /lib/ ...
Users can't change flags on asset entries in PSD when the asset was added via a Branch In notify
UE - Anim - Gameplay - Mar 19, 2025Assets added to a PSD via a Branch In notify can't have their flags changed within the database. When the flags (like mirror, disable, etc) are changed, they revert back to the original value when ...
GAS: RemoveReplicatedLooseGameplayTag on unadded tag causes it to be replicated
UE - Gameplay - Gameplay Ability System - Nov 17, 2022A UDN user found that calling AbilitySystemComponent->RemoveReplicatedLooseGameplayTag(TagToRemove); while the gameplay tag was not in the TagMap, will create an entry for it with count 0, see ...