Unreal Engine Issues
Unreal Engine Issues
No warnings or errors if a UEnum has Bitflags metadata, but no Flags flag.
UE - Gameplay - Blueprint Compiler - Jan 29, 2025The problem here isn't obvious: the native enum, EAnotherEnum, is missing the Flags flag for the UEnum. As a result, K2Node_GetEnumeratorNameAsString returns the max enum when it gets a combined fla ...
Bitmask ints can't be converted to strings
UE - Gameplay - Blueprint Compiler - Jan 29, 2025While we do have an auto cast function that handles an int to string conversion, bitmask ints use a "bitmask" subcategory which thwarts are ability to find the cast function. ...
K2Node_GetEnumeratorName doesn't support bitmasks
UE - Gameplay - Blueprint Compiler - Jan 29, 2025This is almost identical to [Link Removed]. The difference is that we need a variant of UEnum::GetNameByValue that supports bitmasks. We'll likely have to run this by Core. ...
Blueprint function-local variable properties don't copy metadata from the source FBPVariableDescription
UE - Gameplay - Blueprint Compiler - Jan 23, 2025FKismetCompilerContext::CreateUserDefinedLocalVariableForFunction() does not copy the metadata from the source FBPVariableDescription entry. Class variables work because there is code for that in FK ...
Bitfield enums don't cast correctly in Blueprints
UE - Gameplay - Blueprint Compiler - Jan 22, 2025The licensee already investigated this a little. The problem appears to be that UKismetNodeHelperLibrary::GetValidValue should be calling IsValidEnumValueOrBitfield as opposed to IsValidEnumValue. ...
Blueprint Struct Issues - Data table wiped data
UE - Gameplay - Blueprint Compiler - Aug 19, 2024The user has come across various issues with using nested blueprint structs within a data table. The first issue relates to changing a variable in a child struct and setting it back then saving, cau ...
Actor instance FComponentReference to other actor instance gets nulled on other actor recompile
UE - Gameplay - Blueprint Compiler - May 21, 2024An editable FComponentReference property on an actor instance can be used to reference another actor's component in the scene. In 4.27 and earlier versions these references were retained when the ot ...
DeterminesOutputType and AutoCreateRefTerm are not compatible
UE - Gameplay - Blueprint Compiler - Jan 19, 2024The issue is due to the UK2Node_PureAssignmentStatement node that's created during node expansion when AutoCreateRefTerm is used on the target function. In the attached DOTBug image, you can see tha ...
Blueprints from UE4 with dangling delegate reroute node crashes on UE5 load
UE - Gameplay - Blueprint Compiler - Dec 22, 2023If a project from UE 4.27 or earlier has a blueprint with a reroute node dangling (no outgoing connection) from a Custom Event Node's delegate pin (red), this blueprint will crash when loaded in UE ...
Selecting an asset directly in a blueprint method parameter asset selector fails when the parameter type is an interface.
UE - Gameplay - 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 ...