UE 5.6.0 Source Build Fails

General Issues and Bug Reporting
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1

Summary

I’m getting the following errors when attempting to build 5.6.0 from source code:

Error C1083 Cannot open include file: '../Plugins/Developer/Concert/ConcertApp/MultiUserClient/Source/MultiUserClient/Private/Widgets/ActiveSession/Replication/Client/Multi/Columns/AssignedClients/MultiStreamColumns_AssignedClients.cpp': No such file or directory

Error C1083 Cannot open compiler generated file: '..\Plugins\VirtualProduction\CaptureManager\CaptureManagerEditor\Intermediate\Build\Win64\x64\UnrealEditor\Development\CaptureManagerEditorSettings\Module.CaptureManagerEditorSettings.cpp.dep.json': No such file or directory

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

UI/Tools

Steps to Reproduce

  1. Download and install VS 2022 and the required components as outlined here:
    https://docs.unrealengine.com/en-US/setting-up-visual-studio-development-environment-for-cplusplus-projects-in-unreal-engine/
  2. Download the source code zip for UE-release-5.6.0 and unzip
  3. Run the setup.bat
  4. Run the GenerateProjectFiles.bat
  5. Open the solution in VS, set the solution configuration and platform to Development Editor - Win64
  6. Attempt to build the UE5 target

Expected Result

Successful compilation of target

Observed Result

Error C1083 Cannot open include file: '../Plugins/Developer/Concert/ConcertApp/MultiUserClient/Source/MultiUserClient/Private/Widgets/ActiveSession/Replication/Client/Multi/Columns/AssignedClients/MultiStreamColumns_AssignedClients.cpp': No such file or directory

Error C1083 Cannot open compiler generated file: '..\Plugins\VirtualProduction\CaptureManager\CaptureManagerEditor\Intermediate\Build\Win64\x64\UnrealEditor\Development\CaptureManagerEditorSettings\Module.CaptureManagerEditorSettings.cpp.dep.json': No such file or directory

Platform(s)

Win64

Additional Notes

I can also confirm that the Module.CaptureManagerEditorSettings.cpp.dep.json file is in fact missing from the downloaded source code. MultiStreamColumns_AssignedClients.cpp however, is present at the cited location.

2

hi @sammichael25
Here is quote from my forked repository for 5.6
Using GitHub means you can check the status of files with

git status

$ cd ue5Lgpu56

$ setup.bat

$ GenerateProjectFiles.bat -2022

$ REM make changes so the file looks like below

$ notepad Engine\Saved\UnrealBuildTool\BuildConfiguration.xml


<?xml version="1.0" encoding="utf-8" ?>
<Configuration xmlns="https://www.unrealengine.com/BuildConfiguration">
   <!-- This file must be copied into Engine\Saved\UnrealBuildTool\\BuildConfiguration.xml -->
   <!-- see https://docs.unrealengine.com/5.2/en-US/build-configuration-for-unreal-engine/ -->
   <ProjectFileGenerator>
     <Format>VisualStudio2022</Format>
   </ProjectFileGenerator>
   <BuildConfiguration>
   <!-- This will stop generation OF 48GB PDB debug files NOT needed in LGPU 5.4-->
   <bUsePDBFiles>false</bUsePDBFiles>
   <bOmitPCDebugInfoInDevelopment>true</bOmitPCDebugInfoInDevelopment> 
   <bDisableDebugInfoForGeneratedCode>true</bDisableDebugInfoForGeneratedCode>
   </BuildConfiguration>

</Configuration>

Right-click UE5.sln and select “Open With” → “Microsoft Visual Studio 2022”

When the Repository has opened in VS 2022. Right Click UE5 and select “Set As Startup Project”

Set your solution configuration to Development Editor and your solution platform to Win64,

then right click the UE5 target and select Build.
from
jimshalo10/UnrealEngine25: 10th May 2025 Version 5.6

3

I was having this issue too. My engine was under the path C:/Users/Username/Source/Project/Engine, which caused the max path length on windows to be exceeded when building MultiStreamColumns_AssignedClients.cpp. I moved my Engine to the root of the drive at C:/ at that fixed the problem for me.

I did try to increase the windows path length limit through the registry, but that didn’t have any effect.

1 Like
4

I had the same problem, and it turned out to be caused by an excessively long folder path. I fixed this by creating a directory junction.

My Unreal source folder was something like D:\blabla\bla\blaha\UnrealEngine

I ran this command in PowerShell :

New-Item -Path "D:\UE" -ItemType Junction -Value "D:\blabla\bla\blaha\UnrealEngine"

Then I opened the solution from the D:\UE folder and build again.
it now has no errors.

1 Like