Compiling UE 4 first time - Unable to read module manifest

Development Programming & Scripting C++
1

After compiling successfully for the first time without errors when trying to launch UE4Editor.exe I get the following error

Any CPP experts care to tell me what is possibly happening?
UE4_launchError.JPG

2

Iā€™ve never seen that error. What build config is this, Iā€™m guessing Development Editor is usually the default?

3

Thanks for the reply. Many hours later have made some progress.
Now am able to compile with only some warnings but get the following repeated error on launching an instance from VS2017

Not sure if this is possibly related to my Visual Studio configuration or??

1 Like
4

Ok update in case it might help others.
I think the issue was an incorrect Visual Studio configuration. I was missing the NuGet package. After modifying my install, a ran Setup.bat once more then GenerateProjectFiles.bat.
Recompiled once more and voila!

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5

You may also be on an outdated version of VS. All you really need is the latest version of the free community edition.

6

I am getting the same error with 4.26.2 default source, after the project was built with VS 2019 successful as Development Server.

4.27 source built fine, and runs fine.

7

Today downloaded 4.26.2 again with Git,
and Setup.bat gave no download interruptions - build went fine.

8

Getting the same error again but this time after a successful compile of the Nvidia NVRTX 5.1 Caustics branch.

On attempting to launch any of the sample projects I get a crash with the following error message "Unable to read module manifest fromā€¦ Imgur: The magic of the Internet

In checking my build files I see that there has been no UnrealEditor.modules file generated.

9

Ive learned after 4 days working on the physics project built in 4.26 which VS 2017 is needed while another project in 4.27 requires VS 2019. After many rebuilds I noticed the community version of VS is needed as I did not have the c++ module for game development available once I installed the community version it was there. I look forward to this being my last time building with the wrong version.

10

Hello, I have this same error. What did you mean by ā€œafter modifying my installā€? what did you modify?

11

Did you ever figure this out? Iā€™m hitting the same wall and there is very little help online to illuminate why this is happening.

12

Can you try this

copy ā€œBuildConfiguration.xmlā€ as backup
delete ā€œBuildConfiguration.xmlā€ in C:\Users\YOUR_USER_NAME\AppData\Roaming\Unreal Engine\UnrealBuildTool

  • create new project
  • OR delete Saved, Intermediate, Binaries folders and generated VS files

Unreal Engine will generate new default ā€œBuildConfiguration.xmlā€

And check my previous case and solution