Unreal Engine Issues
Unreal Engine Issues
Engine Crashes When Trying to Add an Entry to a TMap in a Nested Struct That is an Element of an Array
Tools - Oct 3, 2019When trying to add an entry to a TMap in a nested struct that is an element of an array the engine crashes. This doesn't happen if it is not an array of the nested struct. Attached are .h and .cpp ...
Changing "Coordinate Light Map Index" When "Generate Lightmap UVs" Is Enabled In A Static Mesh Crashes Engine
Tools - Dec 31, 2019When altering "Coordinate Light Map Index" in a static mesh when "Generate Lightmap UVs" is enabled in LOD 0 the engine will crash or "Coordinate Light Map Index" will be set to 0. A demonstration ...
"Favorite Levels" not persisting correctly when changed in the Editor
UE - Editor - Workflow Systems - Nov 21, 2023In the Level Editor's "File" menu, there is a "Favorite Levels" list, which is persisted in the config file "EditorPerProjectUserSettings.ini" under section "[FavoriteFiles]". Manually editing this ...
Editor crash while saving asset during cook operation
UE - Foundation - Data Pipeline - Cooker - Apr 2, 2025It is possible to experience an editor crash in 5.5.4 when the cook process generates a warning that references an asset while the editor is saving. It seems that during a save operation, the code t ...
Assertion failed in FNetGUIDCache::CleanReferences during seamless travel after reloading primary asset package
UE - Networking - May 7, 2025Following this sequence of events, the ObjectLookup and NetGUIDLookup on the server's PackageMapClient will end up in a bad state. In the ObjectLookup Map, the primary asset's package will be mapped ...
BlueprintNativeEvent in Component Subclass does not show up in BP with the component
UE - Gameplay - Blueprint - Apr 20, 2015If a function is marked as BlueprintNativeEvent inside of a class that inherits from a component (Scene component, Actor component, etc) then the function cannot be called in a blueprint with the co ...
Right-clicking in the Event Graph of a second Blueprint created using Create Blueprint Using This... will crash the editor
UE - Gameplay - Blueprint - Dec 9, 2014Right-clicking in the Event Graph of a second Blueprint created using Create Blueprint Using This... will crash the editor. Crash Report: [Link Removed] Call Stack:<unknown module>! KERNELBASE!Rai ...
Blueprint actor variables defined in code cannot be set in the editor
UE - Gameplay - Blueprint - Jan 28, 2015After creating a class in VS and creating a blueprint based on the class. Setting the actor variable in the BP's defaults tab does not save the setting. Instead it will show as none when trying to ...
When using "Set Playback Position" after "Pause", actor transforms are broken
UE - Anim - Sequencer - Jul 12, 2016When using "Set Playback Position" after "Pause", actor transforms are broken. Sending them off to an unexpected position. Adding a delay seems to resolve the issue, but seems like it should still ...
Post process settings struct will not open/break to adjust individual settings
UE - Gameplay - Blueprint - Nov 12, 2015attempting to break the post process settings struct or split a post process settings struct pin causes pin to disappear, leaving a blank target node. ...