TypeLoadException when setting Imgui Context

[JimmyDirect]

Hello,
I know this might not necessarily be a HexaNet.Imgui problem but I would need help troubleshooting the following exception, which happens only on a specific Machine but works fine on others.

The type initializer for 'Hexa.NET.ImGui.Backends.D3D11.ImGuiImplD3D11' threw an exception.
 ---> System.TypeInitializationException: The type initializer for 'Hexa.NET.ImGui.Backends.ImGuiImpl' threw an exception.
 ---> System.DllNotFoundException: Unable to load DLL 'ImGuiImpl.dll' or one of its dependencies: The specified procedure could not be found. (0x8007007F)
   at System.Runtime.InteropServices.NativeLibrary.Load(String libraryPath)
   at HexaGen.Runtime.LibraryLoader.LoadLibrary(LibraryNameCallback libraryNameCallback, LibraryExtensionCallback libraryExtensionCallback)
   at Hexa.NET.ImGui.Backends.ImGuiImpl..cctor()
   --- End of inner exception stack trace ---
   at Hexa.NET.ImGui.Backends.D3D11.ImGuiImplD3D11..cctor()
   --- End of inner exception stack trace ---
   at Hexa.NET.ImGui.Backends.D3D11.ImGuiImplD3D11.SetCurrentContext(ImGuiContextPtr ctx)

The mentioned DLL file is there for sure and this is the code that leads to that exception:

            _deviceContext = (Vortice.Direct3D11.ID3D11DeviceContext)deviceContext.DeviceContext;
            _device = (Vortice.Direct3D11.ID3D11Device)device.Device;
            
            _imGuiContext = ImGui.CreateContext();
            ImGui.SetCurrentContext(_imGuiContext);

            unsafe
            {
                var d = new ID3D11DevicePtr((ID3D11Device*)_device.NativePointer);
                var c = new ID3D11DeviceContextPtr((ID3D11DeviceContext*)_deviceContext.NativePointer);

                ImGuiImplD3D11.SetCurrentContext(_imGuiContext); // throws
                ImGuiImplD3D11.Init(d, c);
            }

I checked with a native dependency checker tool directly on the affected machine, but it says all dependencies are fulfilled.

This is on Win10 with Nvidia GPU with these versions:

• Hexa.NET.ImGui Version="2.2.8.5"
• Hexa.NET.ImGui.Backends Version="1.0.17.4"

Thanks for any help!

[JunaMeinhold]

Which. NET version are you using? Also please enable mixed mode debugging that way it gives you more information in the debug log window.

Does the machine have the C++ Visual Studio Redistributeable installed? If not, try installing the latest

[JimmyDirect]

Thanks for you answer!

.NET 8.0.204
Latest VC Redist: yes
Mixed mode debugging: Unfortunately it is not so easy to install VS on the affected machine. Is there any other way to see the native exception? I already checked Windows Event Logs, but there is nothing.

The affected machine is also running Win10 2019 LTSC, while others where it works are on latest Win10 2021.

[JunaMeinhold]

This issue likely stems from

Hexa.NET.ImGui/.github/workflows/cmake-backends.yml

Line 15 in 612fb62

cmake-flags-windows: -DCMAKE_SYSTEM_VERSION=10.0.26100.0

The SDK version 10.0.26100.0
Supported operating systems

Windows 11, version 21h2 or higher: Home, Pro, Education, and Enterprise (LTSC is not supported for UWP)
Windows 10, version 1507 or higher: Home, Pro, Education, and Enterprise (LTSB/LTSC and S mode are not supported for UWP)
Windows Server 2022, Windows Server 2019, Windows Server 2016, and Windows Server 2012 R2 (Command line only)
Windows 8.1
Windows 7 SP1

(Not all tools are supported on earlier operating systems)
source: https://learn.microsoft.com/en-us/windows/apps/windows-sdk/

[JimmyDirect]

If it helps the exact Windows version where it fails is:
Microsoft Windows NT 10.0.17763.0

The one where it works is:
Microsoft Windows NT 10.0.19044.0