Unable to generate C++ project after upgrading to Visual Studio 17.12 [blocking]

frankiezafe · November 14, 2024, 3:55pm

Environment:

Unreal 5.4.4
Visual Studio 17.12 Community
Windows 11

I have a very annoying issue since i updated VS this morning. After several reinstallation following documentation on unreal and microsoft website + trying to reload configuration from an another computer via “load configuration” in Visual Studio Installer, i still have these errors when i try to generate a C++ project out of the Project Browser:

Running C:/Program Files/Epic Games/UE_5.4/Engine/Build/BatchFiles/Build.bat  -projectfiles -project="...UDEV.uproject" -game -rocket -progress -log="...UDEV/Saved/Logs/UnrealVersionSelector-2024.11.14-16.52.04.log"
Using bundled DotNet SDK version: 6.0.302
Building UnrealBuildTool with dotnet...
Microsoft (R) Build Engine version 17.2.0+41abc5629 for .NET
Copyright (C) Microsoft Corporation. All rights reserved.

C:\Users\frank\.nuget\packages\system.diagnostics.diagnosticsource\9.0.0\buildTransitive\netcoreapp2.0\System.Diagnostics.DiagnosticSource.targets(4,5): warning : System.Diagnostics.DiagnosticSource 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.primitives\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Primitives.targets(4,5): warning : Microsoft.Extensions.Primitives 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.dependencyinjection.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.DependencyInjection.Abstractions.targets(4,5): warning : Microsoft.Extensions.DependencyInjection.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.options\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Options.targets(4,5): warning : Microsoft.Extensions.Options 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.configuration.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Configuration.Abstractions.targets(4,5): warning : Microsoft.Extensions.Configuration.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.logging.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Logging.Abstractions.targets(4,5): warning : Microsoft.Extensions.Logging.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.dependencyinjection\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.DependencyInjection.targets(4,5): warning : Microsoft.Extensions.DependencyInjection 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.logging\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Logging.targets(4,5): warning : Microsoft.Extensions.Logging 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.configuration\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Configuration.targets(4,5): warning : Microsoft.Extensions.Configuration 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.http\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Http.targets(4,5): warning : Microsoft.Extensions.Http 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.MsBuild\EpicGames.MsBuild.csproj : warning NU1701: Package 'Microsoft.Build 17.12.6' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework 'net6.0'. This package may not be fully compatible with your project. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.MsBuild\EpicGames.MsBuild.csproj : warning NU1701: Package 'Microsoft.IO.Redist 6.0.1' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework 'net6.0'. This package may not be fully compatible with your project. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605: Detected package downgrade: System.Memory from 4.6.0 to 4.5.5. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605:  EpicGames.IoHash -> EpicGames.Core -> System.Memory (>= 4.6.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605:  EpicGames.IoHash -> System.Memory (>= 4.5.5) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605: Detected package downgrade: System.Memory from 4.6.0 to 4.5.5. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605:  EpicGames.Serialization -> EpicGames.IoHash -> EpicGames.Core -> System.Memory (>= 4.6.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605:  EpicGames.Serialization -> EpicGames.IoHash -> System.Memory (>= 4.5.5) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Logging.Console from 9.0.0 to 6.0.0. Reference the package directly from the project to select a different version. 
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605:  UnrealBuildTool -> EpicGames.Core -> Microsoft.Extensions.Logging.Console (>= 9.0.0) 
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605:  UnrealBuildTool -> Microsoft.Extensions.Logging.Console (>= 6.0.0)
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Http.Polly from 9.0.0 to 6.0.26. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> EpicGames.Core -> Microsoft.Extensions.Http.Polly (>= 9.0.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> Microsoft.Extensions.Http.Polly (>= 6.0.26) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Logging from 9.0.0 to 6.0.0. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> EpicGames.Core -> Microsoft.Extensions.Logging (>= 9.0.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> Microsoft.Extensions.Logging (>= 6.0.0) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]

Build FAILED.

C:\Users\frank\.nuget\packages\system.diagnostics.diagnosticsource\9.0.0\buildTransitive\netcoreapp2.0\System.Diagnostics.DiagnosticSource.targets(4,5): warning : System.Diagnostics.DiagnosticSource 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.primitives\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Primitives.targets(4,5): warning : Microsoft.Extensions.Primitives 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.dependencyinjection.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.DependencyInjection.Abstractions.targets(4,5): warning : Microsoft.Extensions.DependencyInjection.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.options\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Options.targets(4,5): warning : Microsoft.Extensions.Options 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.configuration.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Configuration.Abstractions.targets(4,5): warning : Microsoft.Extensions.Configuration.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.logging.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Logging.Abstractions.targets(4,5): warning : Microsoft.Extensions.Logging.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.dependencyinjection\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.DependencyInjection.targets(4,5): warning : Microsoft.Extensions.DependencyInjection 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.logging\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Logging.targets(4,5): warning : Microsoft.Extensions.Logging 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.configuration\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Configuration.targets(4,5): warning : Microsoft.Extensions.Configuration 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.http\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Http.targets(4,5): warning : Microsoft.Extensions.Http 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.MsBuild\EpicGames.MsBuild.csproj : warning NU1701: Package 'Microsoft.Build 17.12.6' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework 'net6.0'. This package may not be fully compatible with your project. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.MsBuild\EpicGames.MsBuild.csproj : warning NU1701: Package 'Microsoft.IO.Redist 6.0.1' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework 'net6.0'. This package may not be fully compatible with your project. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605: Detected package downgrade: System.Memory from 4.6.0 to 4.5.5. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605:  EpicGames.IoHash -> EpicGames.Core -> System.Memory (>= 4.6.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605:  EpicGames.IoHash -> System.Memory (>= 4.5.5) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605: Detected package downgrade: System.Memory from 4.6.0 to 4.5.5. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605:  EpicGames.Serialization -> EpicGames.IoHash -> EpicGames.Core -> System.Memory (>= 4.6.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605:  EpicGames.Serialization -> EpicGames.IoHash -> System.Memory (>= 4.5.5) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Logging.Console from 9.0.0 to 6.0.0. Reference the package directly from the project to select a different version. 
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605:  UnrealBuildTool -> EpicGames.Core -> Microsoft.Extensions.Logging.Console (>= 9.0.0) 
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605:  UnrealBuildTool -> Microsoft.Extensions.Logging.Console (>= 6.0.0)
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Http.Polly from 9.0.0 to 6.0.26. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> EpicGames.Core -> Microsoft.Extensions.Http.Polly (>= 9.0.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> Microsoft.Extensions.Http.Polly (>= 6.0.26) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Logging from 9.0.0 to 6.0.0. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> EpicGames.Core -> Microsoft.Extensions.Logging (>= 9.0.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> Microsoft.Extensions.Logging (>= 6.0.0) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
    12 Warning(s)
    5 Error(s)

Time Elapsed 00:00:03.93
ERROR: Failed to build UnrealBuildTool.

Here is the VS configuration:

{
  "version": "1.0",
  "components": [
    "Microsoft.VisualStudio.Component.CoreEditor",
    "Microsoft.VisualStudio.Workload.CoreEditor",
    "Microsoft.Net.Component.4.8.SDK",
    "Microsoft.Net.Component.4.7.2.TargetingPack",
    "Microsoft.Net.ComponentGroup.DevelopmentPrerequisites",
    "Microsoft.VisualStudio.Component.TypeScript.TSServer",
    "Microsoft.VisualStudio.ComponentGroup.WebToolsExtensions",
    "Microsoft.VisualStudio.Component.JavaScript.TypeScript",
    "Microsoft.VisualStudio.Component.Roslyn.Compiler",
    "Microsoft.Component.MSBuild",
    "Microsoft.VisualStudio.Component.Roslyn.LanguageServices",
    "Microsoft.VisualStudio.Component.TextTemplating",
    "Microsoft.VisualStudio.Component.NuGet",
    "Microsoft.VisualStudio.Component.SQL.CLR",
    "Microsoft.Component.ClickOnce",
    "Microsoft.VisualStudio.Component.ManagedDesktop.Core",
    "Microsoft.NetCore.Component.Runtime.9.0",
    "Microsoft.NetCore.Component.Runtime.8.0",
    "Microsoft.NetCore.Component.SDK",
    "Microsoft.VisualStudio.Component.FSharp",
    "Microsoft.ComponentGroup.ClickOnce.Publish",
    "Microsoft.NetCore.Component.DevelopmentTools",
    "Microsoft.VisualStudio.Component.AppInsights.Tools",
    "Microsoft.Net.Component.4.8.TargetingPack",
    "Microsoft.Net.ComponentGroup.4.8.DeveloperTools",
    "Microsoft.VisualStudio.Component.DiagnosticTools",
    "Microsoft.VisualStudio.Component.EntityFramework",
    "Microsoft.VisualStudio.Component.Debugger.JustInTime",
    "Component.Microsoft.VisualStudio.LiveShare.2022",
    "Microsoft.VisualStudio.Component.IntelliCode",
    "Component.VisualStudio.GitHub.Copilot",
    "Microsoft.NetCore.Component.Runtime.6.0",
    "Microsoft.Net.Component.4.6.2.TargetingPack",
    "Microsoft.VisualStudio.Component.VC.CoreIde",
    "Microsoft.VisualStudio.Component.Windows10SDK",
    "Microsoft.VisualStudio.Component.VC.Tools.x86.x64",
    "Microsoft.VisualStudio.Component.Graphics.Tools",
    "Microsoft.VisualStudio.Component.VC.DiagnosticTools",
    "Microsoft.VisualStudio.Component.Windows11SDK.22621",
    "Microsoft.VisualStudio.Component.ManagedDesktop.Prerequisites",
    "Microsoft.VisualStudio.Component.DotNetModelBuilder",
    "Microsoft.VisualStudio.ComponentGroup.WindowsAppSDK.Cs",
    "Microsoft.ComponentGroup.Blend",
    "Microsoft.VisualStudio.Workload.ManagedDesktop",
    "Microsoft.VisualStudio.Component.VC.ATL",
    "Microsoft.VisualStudio.Component.VC.Redist.14.Latest",
    "Microsoft.VisualStudio.ComponentGroup.NativeDesktop.Core",
    "Microsoft.VisualStudio.Component.Windows11Sdk.WindowsPerformanceToolkit",
    "Microsoft.VisualStudio.Component.CppBuildInsights",
    "Microsoft.VisualStudio.ComponentGroup.WebToolsExtensions.CMake",
    "Microsoft.VisualStudio.Component.VC.CMake.Project",
    "Microsoft.VisualStudio.Component.VC.TestAdapterForBoostTest",
    "Microsoft.VisualStudio.Component.VC.TestAdapterForGoogleTest",
    "Microsoft.VisualStudio.Component.VC.ASAN",
    "Microsoft.VisualStudio.Component.Vcpkg",
    "Microsoft.VisualStudio.Component.Windows10SDK.20348",
    "Microsoft.Component.NetFX.Native",
    "Microsoft.VisualStudio.Component.Graphics",
    "Microsoft.VisualStudio.Workload.NativeDesktop",
    "Microsoft.VisualStudio.Component.WindowsAppSdkSupport.CSharp",
    "Microsoft.VisualStudio.ComponentGroup.WindowsAppDevelopment.Prerequisites",
    "Microsoft.VisualStudio.ComponentGroup.UWP.NetCoreAndStandard",
    "Microsoft.VisualStudio.Workload.Universal",
    "Microsoft.VisualStudio.Component.HLSL",
    "Microsoft.Net.ComponentGroup.TargetingPacks.Common",
    "Microsoft.VisualStudio.Component.NuGet.BuildTools",
    "Component.Unreal.Ide",
    "Microsoft.VisualStudio.Workload.NativeGame"
  ],
  "extensions": []
}

Does anyone has a clue on how to solve this?

Cheers

myasga · November 14, 2024, 8:19pm

Have same problems also so critical (17.11.5 does not exist anymore in vs selector)

VS 17.12 (nuget are outdated and vulnerable packages - they can’t be installed / fixed)
5.4.4
W11-2024H2
can’t open my project with regular engine since it need to be rebuilt from source.

frankiezafe · November 15, 2024, 9:35am

@myasga I’ve posted the same issue on stackoverflow (Unable to generate Unreal C++ project after upgrading to Visual Studio 17.12 - Stack Overflow) and a first comment suggest a solution: .net - Error NU1605 Detected package downgrade - Stack Overflow
I’ll watch at this later, just to let you know

Maxxi · November 15, 2024, 2:11pm

Same for me with VS 17.12 and UE5 5.3, 5.4 and 5.5. I can’t start my project anymore since I’ve updated VS. In my case, I think the pb is because the recommanded version of the compiler “MSVC v143 14.38” is not available anymore in VS 17.12. I contacted the microsoft support and I’m waiting for the answer.

BARBARA32_sniper · November 15, 2024, 2:36pm

Have the same with UE 5.4.4. But it works correctly with UE 5.5.0 as for me

myasga · November 15, 2024, 3:40pm

(post deleted by author)

myasga · November 16, 2024, 11:45am

(post deleted by author)

TrueFranco · November 16, 2024, 7:26pm

For Unreal 5.4.4 you need this in your Visual Studio Installation.

myasga · November 16, 2024, 9:26pm

disabling just “latest” in 17.12 solve the problem what a shot.Thanks!

Maxxi · November 17, 2024, 7:54pm

Unfortunately, the pb is “msvc v143 14.38” is not there anymore in VS 17.12

TrueFranco · November 17, 2024, 8:20pm

You can use this Python scrip and download what ever you want .

gist.github.com

https://gist.github.com/mmozeiko/7f3162ec2988e81e56d5c4e22cde9977

!README.md

This downloads standalone MSVC compiler, linker & other tools, also headers/libraries from Windows SDK into portable folder, without installing Visual Studio. Has bare minimum components - no UWP/Store/WindowsRT stuff, just files & tools for native desktop app development.

Run `py.exe portable-msvc.py` and it will download output into `msvc` folder. By default it will download latest available MSVC & Windows SDK - currently v14.40.33807 and v10.0.26100.0.

You can list available versions with `py.exe portable-msvc.py --show-versions` and then pass versions you want with `--msvc-version` and `--sdk-version` arguments.

To use cl.exe/link.exe first run `setup_TARGET.bat` - after that PATH/INCLUDE/LIB env variables will be updated to use all the tools as usual. You can also use clang-cl.exe with these includes & libraries.

To use clang-cl.exe without running setup.bat, pass extra `/winsysroot msvc` argument (msvc is folder name where output is stored).

portable-msvc.py

#!/usr/bin/env python3

import io
import os
import sys
import stat
import json
import shutil
import hashlib
import zipfile

This file has been truncated. show original

Maxxi · November 18, 2024, 9:16am

Thanks for the tips, I was able to download MSVC 14.38 with the python script but it still doesn’t show up in VS installer 2022 so I can’t select it. Am I missing something?

TrueFranco · November 18, 2024, 12:32pm

I think you can install it with the script and it will setup your windows path. you dont need to see in the VS installer , just make sure is in your windows path.

frankiezafe · November 18, 2024, 4:43pm

hello, thanks a lot for the script.

i uninstalled VS and run the script
reinstalled VS 17.12 with only the packages you mention
rerun the script with VS 17.12 installed

and i still have the same issues NU1605. is a fresh install required or will it be the same issue?

Running C:/Program Files/Epic Games/UE_5.4/Engine/Build/BatchFiles/Build.bat  -projectfiles -project="C:/Users/frank/Documents/Unreal Projects/MyProject/MyProject.uproject" -game -rocket -progress
Using bundled DotNet SDK version: 6.0.302
Building UnrealBuildTool with dotnet...
Microsoft (R) Build Engine version 17.2.0+41abc5629 for .NET
Copyright (C) Microsoft Corporation. All rights reserved.

C:\Users\frank\.nuget\packages\system.diagnostics.diagnosticsource\9.0.0\buildTransitive\netcoreapp2.0\System.Diagnostics.DiagnosticSource.targets(4,5): warning : System.Diagnostics.DiagnosticSource 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.primitives\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Primitives.targets(4,5): warning : Microsoft.Extensions.Primitives 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.dependencyinjection.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.DependencyInjection.Abstractions.targets(4,5): warning : Microsoft.Extensions.DependencyInjection.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.options\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Options.targets(4,5): warning : Microsoft.Extensions.Options 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.configuration.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Configuration.Abstractions.targets(4,5): warning : Microsoft.Extensions.Configuration.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.logging.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Logging.Abstractions.targets(4,5): warning : Microsoft.Extensions.Logging.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.dependencyinjection\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.DependencyInjection.targets(4,5): warning : Microsoft.Extensions.DependencyInjection 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.logging\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Logging.targets(4,5): warning : Microsoft.Extensions.Logging 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.configuration\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Configuration.targets(4,5): warning : Microsoft.Extensions.Configuration 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.http\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Http.targets(4,5): warning : Microsoft.Extensions.Http 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.MsBuild\EpicGames.MsBuild.csproj : warning NU1701: Package 'Microsoft.Build 17.12.6' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework 'net6.0'. This package may not be fully compatible with your project. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.MsBuild\EpicGames.MsBuild.csproj : warning NU1701: Package 'Microsoft.IO.Redist 6.0.1' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework 'net6.0'. This package may not be fully compatible with your project. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605: Detected package downgrade: System.Memory from 4.6.0 to 4.5.5. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605:  EpicGames.IoHash -> EpicGames.Core -> System.Memory (>= 4.6.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605:  EpicGames.IoHash -> System.Memory (>= 4.5.5) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605: Detected package downgrade: System.Memory from 4.6.0 to 4.5.5. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605:  EpicGames.Serialization -> EpicGames.IoHash -> EpicGames.Core -> System.Memory (>= 4.6.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605:  EpicGames.Serialization -> EpicGames.IoHash -> System.Memory (>= 4.5.5) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Http.Polly from 9.0.0 to 6.0.26. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> EpicGames.Core -> Microsoft.Extensions.Http.Polly (>= 9.0.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> Microsoft.Extensions.Http.Polly (>= 6.0.26) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Logging from 9.0.0 to 6.0.0. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> EpicGames.Core -> Microsoft.Extensions.Logging (>= 9.0.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> Microsoft.Extensions.Logging (>= 6.0.0) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Logging.Console from 9.0.0 to 6.0.0. Reference the package directly from the project to select a different version. 
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605:  UnrealBuildTool -> EpicGames.Core -> Microsoft.Extensions.Logging.Console (>= 9.0.0) 
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605:  UnrealBuildTool -> Microsoft.Extensions.Logging.Console (>= 6.0.0)

Build FAILED.

C:\Users\frank\.nuget\packages\system.diagnostics.diagnosticsource\9.0.0\buildTransitive\netcoreapp2.0\System.Diagnostics.DiagnosticSource.targets(4,5): warning : System.Diagnostics.DiagnosticSource 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.primitives\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Primitives.targets(4,5): warning : Microsoft.Extensions.Primitives 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.dependencyinjection.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.DependencyInjection.Abstractions.targets(4,5): warning : Microsoft.Extensions.DependencyInjection.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.options\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Options.targets(4,5): warning : Microsoft.Extensions.Options 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.configuration.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Configuration.Abstractions.targets(4,5): warning : Microsoft.Extensions.Configuration.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.logging.abstractions\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Logging.Abstractions.targets(4,5): warning : Microsoft.Extensions.Logging.Abstractions 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.dependencyinjection\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.DependencyInjection.targets(4,5): warning : Microsoft.Extensions.DependencyInjection 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.logging\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Logging.targets(4,5): warning : Microsoft.Extensions.Logging 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.configuration\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Configuration.targets(4,5): warning : Microsoft.Extensions.Configuration 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Users\frank\.nuget\packages\microsoft.extensions.http\9.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.Http.targets(4,5): warning : Microsoft.Extensions.Http 9.0.0 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.MsBuild\EpicGames.MsBuild.csproj : warning NU1701: Package 'Microsoft.Build 17.12.6' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework 'net6.0'. This package may not be fully compatible with your project. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.MsBuild\EpicGames.MsBuild.csproj : warning NU1701: Package 'Microsoft.IO.Redist 6.0.1' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework 'net6.0'. This package may not be fully compatible with your project. [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605: Detected package downgrade: System.Memory from 4.6.0 to 4.5.5. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605:  EpicGames.IoHash -> EpicGames.Core -> System.Memory (>= 4.6.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.IoHash\EpicGames.IoHash.csproj : error NU1605:  EpicGames.IoHash -> System.Memory (>= 4.5.5) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605: Detected package downgrade: System.Memory from 4.6.0 to 4.5.5. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605:  EpicGames.Serialization -> EpicGames.IoHash -> EpicGames.Core -> System.Memory (>= 4.6.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Serialization\EpicGames.Serialization.csproj : error NU1605:  EpicGames.Serialization -> EpicGames.IoHash -> System.Memory (>= 4.5.5) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Http.Polly from 9.0.0 to 6.0.26. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> EpicGames.Core -> Microsoft.Extensions.Http.Polly (>= 9.0.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> Microsoft.Extensions.Http.Polly (>= 6.0.26) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Logging from 9.0.0 to 6.0.0. Reference the package directly from the project to select a different version.  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> EpicGames.Core -> Microsoft.Extensions.Logging (>= 9.0.0)  [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\Shared\EpicGames.Horde\EpicGames.Horde.csproj : error NU1605:  EpicGames.Horde -> Microsoft.Extensions.Logging (>= 6.0.0) [C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj]
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605: Detected package downgrade: Microsoft.Extensions.Logging.Console from 9.0.0 to 6.0.0. Reference the package directly from the project to select a different version. 
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605:  UnrealBuildTool -> EpicGames.Core -> Microsoft.Extensions.Logging.Console (>= 9.0.0) 
C:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.csproj : error NU1605:  UnrealBuildTool -> Microsoft.Extensions.Logging.Console (>= 6.0.0)
    12 Warning(s)
    5 Error(s)

Time Elapsed 00:00:01.70
ERROR: Failed to build UnrealBuildTool.

frankiezafe · November 18, 2024, 5:06pm

I found it in the list (see Modify > Individual components), but even after deinstalling the latest and reinstalling the 14.38, the issue with nuget package stays the same.

myasga · November 18, 2024, 7:18pm

hey did you try only uncheck latest and run code without running script? (Also skip nuget information in right corner?)

Maxxi · November 18, 2024, 7:34pm

It didn’t work for me either but I contacted Microsoft support last thursday. They are still investigating. Potentially this bug is gonna happen to any developper upgrading VS in the last version so Microsoft has no choice than to fix it. Hopefully, it’s not gonna take too long, we are waisting our time and money right now

myasga · November 19, 2024, 10:51am

Ive get information from MS that Epic update their branches and now should all work ! So try to download Engine now;)

BARBARA32_sniper · November 19, 2024, 1:11pm

Did VS work for you?

Maxxi · November 19, 2024, 5:17pm

MS told me the same but Epic updated the main branch which is I think basically UE5 5.6 beta. I can’t use a beta version for my project. At least I was able to revert back to 5.3 today and work with my project using VS 2022 17.12