Unreal Engine Issues
Unreal Engine Issues
Failure to attach component in a non-nativized child Blueprint class to an inherited component from a nativized parent Blueprint class.
UE - Gameplay - Blueprint - May 30, 2018Attachment will currently fail at runtime during load and/or construction if a component from a non-nativized child Blueprint is attached to an inherited component from a parent class that is nativi ...
Blueprint Functional Tests Failing When Run Dedicated Server is Enabled
UE - Automation Test - Feb 28, 2017When Run Dedicated Server is enabled, it appears that functional tests are not able to succeed. The following error is appearing in the Automation Test Results: No functional testing script on map ...
UToolMenus::GenerateWidget can crash while calling PopulateMenuBuilder
UE - Editor - Workflow Systems - Nov 24, 2023A user reported that UToolMenus::GenerateWidget will crash if UToolMenus::AddReferencedObject is called during the construction of a menu. Using the above in-code repro steps, I can repro this in a ...
BP - Exclusive nativization will fail at cook time if a BP class includes a ChildActorComponent with a Data-Only BP set as the ChildActor class.
UE - Gameplay - Blueprint - Apr 20, 2017Note: This does not occur when the nativization mode is set to "Inclusive" in the Project settings. Current workaround: Ensure that the ChildActor class is NOT a data-only Blueprint, by adding scri ...
Mesh Variation node usage inside macro - lost of material slot name
UE - Anim - Mutable - Nov 14, 2025When using a mesh variation node within a macro instance script, the material slot name of the input mesh is not transferred. On the generated mesh output, the material slot name is "None" ...
Crash compiling System when a Dynamic Input only outputs a numeric value
UE - Niagara - Apr 7, 2020Crash compiling System when a Dynamic Input only outputs a numeric value Crash occurs using Scratchpad and a Dynamic Input Script asset. The crash does not occur if I connect a parameter to the s ...
Duplicate keys in TMap and TSet after using FJsonObjectConverter::JsonValueToUProperty
UE - CoreTech - UObject - Nov 16, 2021Found here: [Link Removed] The relevant sections in ConvertScalarJsonValueToFPropertyWithContainer() use script helpers to add defaulted elements to each container and then parse straight into them ...
Selecting an asset directly in a blueprint method parameter asset selector fails when the parameter type is an interface.
UE - Framework - Blueprint Compiler - Oct 20, 2023Ensure message: Ensure condition failed: false [KismetCompilerVMBackend.cpp][Line: 1076] It is not possible to express this interface property as a literal value! (InterfaceProperty /Script/BugRepr ...
Crash on Package When Using Nativizing Animation Blueprint Has AnimGraph Connected with Enum
UE - Gameplay - Blueprint - Dec 3, 2019If an AnimNode connected with Enum and AnimBP is nativized, the package will occur crash. Following settings is solve this issue. [BlueprintNativizationSettings] +ExcludedBlueprintTypes=/Script/En ...
Niagara Map Set parameters are improperly named
UE - Niagara - Mar 9, 2020Parameters are misnamed when adding a new parameter to Map Set in a Niagara Module Script Tested: 4.23.1, 4.24.3 , 4.25 preview, 4.26 (main) ...