Unreal Engine Issues
Unreal Engine Issues
Loading a blueprint with an invalid gameplay tag container pin causes ensure and data loss
UE - Gameplay - Feb 23, 2021The gameplay tag system depends on tags being registered with the global manager as valid in order to correctly read them off disk. Two different issues are combining to cause a confusing ensure and ...
Editor crashes due to a material that contains MPCs migrated from another project
UE - Rendering - Architecture - Materials - Apr 29, 2024[2024.04.29-16.49.46:563][970]LogUObjectGlobals: Warning: LoadPackage can't find package /BEURRE_040824_041224/NewMaterialParameterCollection. [2024.04.29-16.49.46:563][970]LogUObjectGlobals: Warning ...
[CrashReport] FCurveEditorSharedData::FCurveEditorSharedData
UE - Niagara - Nov 1, 2017This is a trending crash coming out of the 4.18 release. It may be a regression as there is no record of it occurring in 4.17. User Descriptionsopening a particle from the conetnt browser Source ...
[CrashReport] UE4Editor_UnrealEd!FEdGraphUtilities::PostProcessPastedNodes() [edgraphutilities.cpp:138]
UE - Gameplay - Blueprint - Jan 24, 2017This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Access violation - code c0000005 ( ...
Crash when removing and re-adding instances to an InstancedStaticMeshComponent with PerInstanceCustomData.
UE - World Creation - Worldbuilding Tools - Jan 22, 2026When using an InstancedStaticMeshComponent with PerInstanceCustomData, the number of float elements in the "Custom Data" array should always be equal to NumCustomDataFloats multiplied by the number ...
[CrashReport] UE4Editor_LevelEditor!SLevelViewport::BindShowCommands() [slevelviewport.cpp:1429]
Tools - Nov 10, 2017This 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 ...
Editor Crashes when attempting to copy/paste nodes in Material Editor
UE - Graphics Features - Nov 18, 2014UPDATE: 1/8/2015 Crash Reporter: [Link Removed] Callstack: <unknown module>! KERNELBASE!RaiseException() <unknown module>! UE4Editor_Core!FOutputDeviceWindowsError::Serialize() <unknown module> ...
The process may not return to the root node after the Wait Task is completed.
UE - AI - BehaviorTree - Sep 14, 2021If the Wait Task is completed for the first frame, it may not return to the root node even after Finish. This can be avoided by increasing the wait time of the Wait Task (see CaseOK.mp4). When this ...
[Enhanced Input] Chord trigger fails when its referenced action lives in a lower-priority IMC
UE - Gameplay - Input - May 18, 2026Summary A UInputTriggerChordAction does not fire when the action it references (the "chording action") is mapped in a different Input Mapping Context with a lower priority than the IMC containing the ...
Data Asset Instances created from Blueprints and are not selectable in asset pickers until their parent Blueprint is loaded. They are also not displayed correctly in the Content Browser
UE - Framework - Blueprint - Sep 3, 2024Consider a C++/BP class containing an EditAnywhere/InstanceEditable variable with type (UDataAsset*), (UPrimaryDataAsset*), or any of their subclasses. When setting this variable using a Property Ed ...