Unreal Engine Issues
Unreal Engine Issues
Internal Compiler Error: Tried to create a property Crash in scope Beta_C, but another object (ObjectProperty /Game/Alpha.Alpha_C:Crash) already exists there.
UE - Gameplay - Blueprint - Oct 31, 2019After fixing the crash from [Link Removed] when compiling the child blueprint that has claimed the component name the parent was previously using without having compiled the parent, an internal comp ...
STAT_AI_BehaviorTree_InstanceMemory is sometimes wildly inaccurate
UE - AI - Jun 10, 2020From the UDN thread: Turns out this is caused by the way this stat was implemented for the FBehaviorTreeInstance struct: 1) You call IncMemoryStats on construct, before the struct is populated with ...
FScriptMapHelper::HasKey() and FScriptSetHelper::HasElement() fail on new keys with a substring of another key
UE - Editor - Workflow Systems - Jan 27, 2022Duplicate key checking in maps and sets in the editor is done via calls to FScriptMapHelper::HasKey() and FScriptSetHelper::HasElement(), but this code is checking for object names which are subsets ...
When TSR is enabled, the maximum brightness is clamped to about 16000.
UE - Graphics Features - Jun 7, 2022You can also check it by enabling real-time rendering in the NewMap.umap of the attached project, and then clicking on "High Resolution Screenshots". (You may need to disable and enable post-process ...
The Unreal Engine building dialog either does not appear or is only visible for a brief second
UE - Virtual Production - Nov 18, 2022This is not a regression against 5.0. Tested in //UE5/Release-5.0 CL20979098 However, as users have pointed out, this is a departure from UE4. The same process in 4.27.2 demonstrates the building d ...
CopyFileUnderSourceControl Fails on Already Resolved Files
UE - Editor - Workflow Systems - Apr 12, 2023CopyFileUnderSourceControl has instances when the response is not a success even though the files are copied successfully under source control. It seems FPerforceCopyWorker::Execute() tries to reso ...
Actor Soft Reference in LevelInstance does not have a Referenced Object during PIE
UE - World Creation - Worldbuilding Tools - Level Instances - May 30, 2023When setting an actor on a level to the SoftObjectRefence(Type:Actor) variable and outputting the object name as a PrintString, the object name cannot be correctly obtained if the set actor is place ...
UDataTableFunctionLibrary::AddDataTableRow() fails for blueprint-defined row structure types
UE - Framework - Blueprint - Feb 2, 2024The editor-scripting blueprint node "Add Data Table Row" fails when the Data Table uses a Row Structure that was defined in blueprint. Internally, it checks if the passed-in UScriptStruct is derived ...
Target Points are changing locations within World Partition Maps Shipping Build
UE - World Creation - Worldbuilding Tools - World Partition - Sep 19, 2023Target Point Actors are changing location when in a World Partition Map within a Shipping Build. This does not occur in Non World Partition Maps. The name of the Asset also changes when in a World ...
Pathtracer - Odd results from any material adjusting normals to complement world position changes
UE - Graphics Features - Path Tracer - Sep 30, 2025Someone on the forums is reporting a possible bug with Pathtracer and any material that adjusts normals to complement world position changes. See pic attached. Reporting forum thread:https://foru ...