I added a C++ class to my Blueprint project and then the nightmares began. I am using VS Studio Enterprise 2015 update 3 & Windows 7 64.
Now it won’t even open the project because it says “Missing Project Modules” - “The following modules are missing or built with a different engine version: Would you like to rebuild them now?”
If you say No, it just shuts down, if you say Yes, it shows “Error - Project could not be compiled. Try rebuilding from source manually.”
and then shuts down.
Right click on the .uproject select, Generate visual studio files , then open visual studio, and if it still has problem with windows.h, then i don’t know. best of luck.
Tried that, doesn’t work. Says “This project does not have any source code. You need to add C++ source files to the project from the Editor before you can generate project files.”
Catch 22: Can’t load the editor.
Nope, have that installed. Visual Studio installs the SDK as part of it’s install.
You probably need to install the Windows SDK via the Visual Studio Installer.
I believe you need the Windows 8.1 SDK with VS2015.
Windows.h should then be in a path similar to
C:\Program Files (x86)\Windows Kits\8.1\Include\um
Hope that at least gets you on the right path.
Hi Justice777
My C++ code had some problems and was stopping the editor from launching my project. I thought that if the custom C++ code has bugs, then UE4 will not show my C++ classes in the Editor, or not compile the c++ classes at all, but in Unreal’s case, the editor will not launch the project at all if the C++ code is buggy. This is one of the very scary quirks of UE. I can suggest a temporary workaround and it worked for me. See if this works for you.
Here is the temporary workaround:
Since your C++ project references have been removed from YourProject.uproject, UE4 will not try building your C++ project and will launch your project without your c++ classes.
This works for me. However, please note that I did not have much code and it was easy for me create a new c++ class from the UE4 editor and proceed with the compilation. The main problem is figuring out the dependencies.
Let me know if this helps.
Thanks. Well, that solved the one problem of not being able to open the editor but I still cannot compile the code.
It’s the “fatal error RC1015: cannot open include file ‘windows.h’” that many people have talked about but none of their solutions have worked for me.
Awesome.
Now, to solve your other problem, you need to provide sufficient info about your project, about your targets and attach the entire error message.
Also what have you done about getting UE to recognize windows.h so far ?
Thanks
Not sure what other information you would be looking for. I am only targeting Windows Desktop right now.
I’ve tried the VC++ inherit paths “solution” and I’ve tried manually putting in the Windows 7 SDK path. I’ve also reinstalled that SDK.
I put the compiler error message two comments back.
I want to know about the following:
When I am building for a specific platform like windows, I make sure that the windows specific includes are mentioned between PLATFORM_WINDOWS like this:
#if PLATFORM_WINDOWS
#include “Windows/WindowsSystemIncludes.h”
#endif
I found a solution:
Ta da! It worked for me!
where is the .uproject config file?
I have just tried this solution in Unreal Engine 5 and it managed to make my project launch again.
Unfortunately, it appears to have also corrupted it beyond repair. I reloaded the editor and actors such as health packs and enemies I’ve placed down have disappeared, and the Live Coding button is nowhere to be seen, preventing me from compiling.
When I try to click the play button, the editor gives me a warning stating that my Gamemode file is corrupted.
I may have done something wrong or this solution may not be compatible with Unreal Engine 5. Overall, I would recommend backing up the whole project and exercising some caution before performing this.
