I can't create classes

[nove0nove0]

I have a terrible problem, I can’t create new C++ classes, the new class files are automatically loaded into Visual studio (2020), but I receive a Live Coding error.

I didn’t make any configuration changes in the Engine or in Visual studio, before this happened I was trying to delete a class (WhiteCube) that I had created, I tried to delete it both through the engine and manually using the file explorer.

First I did an integrity check, nothing changed, so I decided to delete the engine and download it again, I created a new project and tried to make a class (WhiteCube) and I keep getting the same problem.

written error:

Registered restarted process D:\EPIC\Unreal\UE_5.1\Engine\Binaries\Win64\UnrealEditor.exe (PID: 15820, previous PID: 14316)
Loading module D:\UNREAL PROJECT\MyProject2\Binaries\Win64\UnrealEditor-MyProject2.dll (0.085 MB)
Loaded 1 module(s) (0.000s, 5 translation units)
Live coding ready - Save changes and press Ctrl+Alt+F11 to re-compile code
Manual recompile triggered
---------- Creating patch ----------
Running D:\EPIC\Unreal\UE_5.1\Engine\Build\BatchFiles\Build.bat -Target=“MyProject2Editor Win64 Development -Project=”“D:/UNREAL PROJECT/MyProject2/MyProject2.uproject”“” -LiveCoding -LiveCodingModules=“D:/EPIC/Unreal/UE_5.1/Engine/Intermediate/LiveCodingModules.txt” -LiveCodingManifest=“D:/EPIC/Unreal/UE_5.1/Engine/Intermediate/LiveCoding.json” -WaitMutex -LiveCodingLimit=100
Quick restart disabled when re-instancing is enabled.
Running UnrealBuildTool: dotnet “…..\Engine\Binaries\DotNET\UnrealBuildTool\UnrealBuildTool.dll” -Target=“MyProject2Editor Win64 Development -Project=”“D:/UNREAL PROJECT/MyProject2/MyProject2.uproject”“” -LiveCoding -LiveCodingModules=“D:/EPIC/Unreal/UE_5.1/Engine/Intermediate/LiveCodingModules.txt” -LiveCodingManifest=“D:/EPIC/Unreal/UE_5.1/Engine/Intermediate/LiveCoding.json” -WaitMutex -LiveCodingLimit=100
Log file: C:\Users\xxx\AppData\Local\UnrealBuildTool\Log.txt
Creating makefile for MyProject2Editor (no existing makefile)
Parsing headers for MyProject2Editor
Running Internal UnrealHeaderTool “D:\UNREAL PROJECT\MyProject2\MyProject2.uproject” “D:\UNREAL PROJECT\MyProject2\Intermediate\Build\Win64\MyProject2Editor\Development\MyProject2Editor.uhtmanifest” -WarningsAsErrors -installed
Total of 3 written
Reflection code generated for MyProject2Editor in 6.5681009 seconds
Building MyProject2Editor…
Using Visual Studio 2019 14.29.30152 toolchain (C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133) and Windows 10.0.22621.0 SDK (C:\Program Files (x86)\Windows Kits\10).
Determining max actions to execute in parallel (12 physical cores, 16 logical cores)
Executing up to 12 processes, one per physical core
Requested 1.5 GB free memory per action, 1023.98 MB available: limiting max parallel actions to 1
Building 6 actions with 1 process…
[1/6] Compile MyProject2GameModeBase.cpp
[2/6] Compile MyProject2.cpp
[3/6] Compile WhiteCube.gen.cpp
[4/6] Compile MyProject2GameModeBase.gen.cpp
[5/6] Compile WhiteCube.cpp
D:\UNREAL PROJECT\MyProject2\Source\MyProject2\Character\WhiteCube.cpp(4): fatal error C1083: Cannot open include file: ‘Character/WhiteCube.h’: No such file or directory
[6/6] Compile MyProject2.init.gen.cpp

[HeellessAchillez]

Cannot open include file: ‘Character/WhiteCube.h’: No such file or directory

It seems you have an #include Character/WhiteCube.h statement in WhiteCube.cpp but it cannot find the file. I would start by making sure that the include actually points to an exsiting file (i.e., that it actually reflects the folder structure in your project).

If you have created files and then moved them around or renamed them, sometimes the includes are not updated.

Edit: I don’t use Visual Studio that much so I wasn’t aware, but it seems it can sometimes create the cpp and the h file in the same folder, but mess up the include. If your files are in the same folder, you can try #include WhiteCube.h instead an see if that works

[nove0nove0]

The files were in the same folder, the “include WhiteCube.h” present in the WhiteCube.cpp file was defined as “include Character/WhiteCube.h”, I remember noticing this, but I don’t know what I did to change it So, if I did anything, it was probably the wrong way.

I made the correction and compiled it, now the class appears normally in the unreal editor, thank you very much for taking the time to help me

[FrostyJas]

Awesome! I’m glad to see you got it resolved and provided the solution. This helps other members and we all appreciate it! Thank you!