Unreal Engine Issues
Unreal Engine Issues
Missing Service Node warning when opening project
UE - AI - Sep 24, 2018Services in the Behavior Tree sometimes don't work when the project is first loaded. The Behavior Tree will print a "missing service node" warning and the BT will remain inactive. This was reported ...
A crash in editor will result after swapping inherited SCS component names at the parent class level before loading a child class that overrides them.
UE - Gameplay - Blueprint - Oct 26, 2018This is an editor-only crash that's due to stack overflow/infinite recursion in UInheritableComponentHandler::FixComponentTemplateName(). We are recursively trying to rename other inherited componen ...
Skeletal Mesh rigid body simulation is not being updated with correct bones locations right after Skeletal Mesh is spawned
UE - Simulation - Physics - Nov 5, 2018When simulating in Editor, the Skeletal Mesh bone locations are not being passed into simulate if the simulation is being toggled the same frame when the Mesh is being set on a Skeletal Mesh compone ...
Confusing build error message provided when semi-colon is not added after a forward declaration in an Interface header file
UE - Foundation - Cpp Tools - UnrealHeaderTool - Feb 15, 2019If a forward declaration of a class is made in the header file for an Interface class, and no semi-colon is included at the end of the forward declaration line, the build will fail with a confusing ...
Creating Online Session always fails in Launch mode when loading another map
UE - Networking - Aug 5, 2019Creating an Online Session and transitioning to another map does not work in a Launched Windows game. The transition event does fire but it just resets the players position on the Default map. This ...
Sequencer Media Tracks trigger crash when an ImageSource is added
Media Framework - Jun 18, 2020The same callstack appears in 4.24.3 (CL-11590370) but only when playing a Sequence with a Media Track that has a ImgMediaSource and Media Texture set on it. These repro steps work for 4.25 and 4.26 ...
VFInitRotation(Cascade) always provides the same rotation
UE - Niagara - Jun 30, 2020This problem caused by incorrect initialization of RandomStream in the GPU particle. //PaticleGpuSimulation.cpp virtual void Init() override { ... check(AllocatedTiles.Num() == TileTimeOfDe ...
BuildPatchTool doesn't finish if enabled building Http Chunk on Mac
Portal - Jan 25, 2021We may fix this issue by the following codes. FPakPlatformFile::FPakPlatformFile(): LowerLevel(NULL) ,bSigned(false) { // remove //FCoreDelegates::GetRegisterEncryptionKeyMulticas ...
Nvidia Graphics Drivers cause editor menus to flicker and disappear after using the editor for an extended period of time
UE - Graphics Features - Apr 16, 2021This issue seems to be occurring on a variety of Nvidia cards. So far, I haven't seen any indication that it is affecting AMD graphics cards. The majority of the reports have indicating that the pro ...
Enhanced Input Axis Actions repeatedly firing the last input value when entering a Common UI menu
UE - Gameplay - Input - Sep 7, 2023When using an axis mapped input action such as looking around with a gamepad joystick, then opening a Common UI menu, the last input axis value will keep firing irrespective of the current joystick ...