VS2019 not finding header file fir project in subdirectory

Development Programming & Scripting C++
1

Hi All,
I just got back into UE4 development.
I created a project outside UE4 engine folder and created a class under a new folder in the Source/ folder.
So, something like: PROJECT/Source/Test/PawnExtended(.h, .cpp)
When I do “Generate Project files” through the righ-click menu option and then go to build the game I get:
|Error|C1083|Cannot open include file: ‘Test/PawnExtended.h’: No such file or directory

I can solve this by adding the PROJECT into the cpp file #include path, but this didn’t used to be a problem in order versions of UE4 . is this a bug??

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2

I think you need to add a module? If you add a C++ class from inside the editor, UE will set all this up for you. Source files go in /Source/ModuleName/Public|Private/.... Modules need a .build.cs in their root dir and I think they need to be added to the uproject file (uplugin for plugins). Then generate should work correctly.

3

Hi AliShug,

This isn’t a module, it’s a uproject game. The game itself was created as a C++ project through the editor. Also the code was added originall through the editor using the “Create new Class” option.
It seems odd that creating this through the editor would fail

4

All UE4 code including game project code must live in modules, unreal should have created at least one module for you if you set up the project as C++. It’s strange that your header isn’t in a Public directory, that might be what’s wrong.

Files should be like this, assuming your module is called “Test”:

Source/Test/Test.build.cs
Source/Test/Public/PawnExtended.h
Source/Test/Private/PawnExtended.cpp
5

In your build.cs file add these lines

PublicIncludePaths.AddRange(
            new string[] {
                "PROJECT/Test"
            }
        );

You can have both the .h and the .cpp files in there.
If you have multiple folders you need to add each of them separated by a comma.
Note: The path starts from the Source folder

Don’t forget to rebuild and if Intellisense complains try regenerating project files

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