Attempting to use the GameplayTags module in a binary code project will result in build failures in Visual Studio.

Using the GameplayTags module in a code project created with the binary version of the Engine results in a build failure in Visual Studio. The following error is shown:

1>  D:/Epic Games/4.7/Engine/Source/Runtime/AIModule/Classes/BehaviorTree/Decorators/BTDecorator_BlueprintBase.h(217) : Unparsed class 'TemporaryUHTHeader_GameplayTagContainer' found while validating DependsOn entries for 'BTDecorator_CheckGameplayTagsOnActor'
1>Error : Failed to generate code for TestGameplayTagsEditor - error code: OtherCompilationError (2)

The same project will build fine when using a version of the Engine built from source code.

1. Create a new code project using the Third Person template, no starter content.
   • The project must be created using a binary version of the Engine.
2. Close the Editor if it opened.
3. In the project's Build.cs file, add the GameplayTags module to the public dependency module names.

   • PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "GameplayTags" });

4. Right-click on the project in Visual Studio and select Rebuild.

RESULT:
The build will fail with the error:

1>  D:/Epic Games/4.7/Engine/Source/Runtime/AIModule/Classes/BehaviorTree/Decorators/BTDecorator_BlueprintBase.h(217) : Unparsed class 'TemporaryUHTHeader_GameplayTagContainer' found while validating DependsOn entries for 'BTDecorator_CheckGameplayTagsOnActor'
1>Error : Failed to generate code for TestGameplayTagsEditor - error code: OtherCompilationError (2)

EXPECTED:
The build completes successfully.

WORKAROUND:
This appears to work fine in versions of the Engine that are built from source code.

Unparsed class found while validating DependsOn entries for - when including GameplayTags module in binary build