UHT always runs when building a code project using a binary Engine installation even if no code change has been made

Core - UnrealHeaderTool - May 2, 2019

When building a code project that was created with the binary Engine installed through the Launcher, UHT always runs even if no code changes have been made. This only occurs with a binary Engine ins ...

Confusing build error message provided when semi-colon is not added after a forward declaration in an Interface header file

Core - UnrealHeaderTool - Feb 15, 2019

If a forward declaration of a class is made in the header file for an Interface class, and no semi-colon is included at the end of the forward declaration line, the build will fail with a confusing ...

UHT "Type TArray is not supported by blueprint" error message is ambiguous

Core - UnrealHeaderTool - Jan 11, 2019

An overly generic error message is produced when you have a TArray UProperty that contains a non-blueprint friendly type. For example: UPROPERTY(EditAnywhere, BlueprintReadWrite, editfixedsize) TA ...

Unable to use TWeakObjectPtrs for the optional Old value for a repnotify function

Core - UnrealHeaderTool - Oct 8, 2018

A user has reported that Unreal Header Tool fails to parse a rep notify function properly when the optional parameter for the Old value is populated with a TWeakObjectPointer. Example of errors:Sev ...

UHT doesn't support trailing const in some declarations

Core - UnrealHeaderTool - Sep 17, 2018

UnrealHeaderTool cannot parse certain declarations with a trailing `const` instead of a leading `const`. ...

Generate Project files does not add Intellisense include paths for .generated.h files

Core - UnrealHeaderTool - Jul 23, 2018

Attempting to open a .generated.h file using intellisense results in an error due to the file not being found as the proper search file paths were not added when generating the project files. Pleas ...

Cannot add a non-static custom thunk to a code class

Core - UnrealHeaderTool - May 7, 2018

In 4.19, it is no longer possible to create a non-static custom thunk in a class. This was possible in 4.18.3. REGRESSION: Yes. ...

UHT fails when building in VS if a function tries to return a UEnum pointer

Core - UnrealHeaderTool - Mar 7, 2018

UHT will fail during build in Visual Studio if a function tries to return a UEnum pointer. Adding a valid keyword before the return type will compile successfully. ...

Returning a const pointer from a UFUNCTION causes a VS compile error

Core - UnrealHeaderTool - Oct 4, 2017

Attempting to return a const pointer from a UFUNCTION will cause a VS compile error The syntax UFUNCTION(BlueprintCallable, Category = test) const UMyActorComp* SomeFunc(); returns a VS compile ...

VS fails to compile when USTRUCT is referenced as BlueprintReadWrite or BlueprintReadOnly

Core - UnrealHeaderTool - Aug 22, 2017

Defining a FBoneReference variable as BlueprintReadWrite or BlueprintReadOnly in the UPROPERTY macro fails to compile in 4.17. The error message provided by VS states: LogCompile: Error: Type 'FT ...