UHT will fail to build a project that contains a BlueprintPure UFUNCTION that returns an ENetMode value.

Marking a function as BlueprintPure will result in a UHT build failure in Visual Studio if the function returns an ENetMode value. The ENetMode enum is not marked as a UENUM(), causing the build to fail.

1. Create a new code project using the First Person template.
2. Build the project in Visual Studio.
3. In the header file for the character class created with the template, add the following lines at the bottom of the class:

   UFUNCTION(BlueprintPure, Category = "Replication")
   ENetMode  GetTheNetMode() const;
   

4. In the source file for the character class, add the following function:

   ENetMode ATestUHTCrash1Character::GetTheNetMode() const
   {
   	return NM_Standalone;
   }
   

5. Build the project in Visual Studio.

RESULT:
The build will fail with the message Unrecognized type 'ENetMode'

• In 4.10, the message has been expanded to also say type must be a UCLASS, USTRUCT or UENUM

EXPECTED:
The build finishes successfully.