LykosAI/StabilityMatrix · error · NotSupportedException

Torch version is not supported.

Error message

Torch version {torchVersion} is not supported.

What it means

Sdfx.InstallPackage builds a GPU flag via a switch on torchVersion and throws NotSupportedException for any TorchIndex value not explicitly mapped (Cuda, Rocm, DirectMl, Cpu, Mps). This indicates an unrecognized or future torch index enum value.

Solutions

1. Update Stability Matrix so Sdfx's install code supports the torch index you selected.
2. Choose a supported torch index for the package (CUDA, ROCm, DirectML, CPU, or MPS).
3. Reset the package's torch/GPU index setting in the package options and reinstall.
4. If developing, add the missing TorchIndex case to the switch in Sdfx.cs.

Example fix

// before
_ => throw new NotSupportedException($"Torch version {torchVersion} is not supported.")
// after
TorchIndex.NewIndex => "--newindex",
_ => throw new NotSupportedException($"Torch version {torchVersion} is not supported.")

var supported = new[] { TorchIndex.Cuda, TorchIndex.Rocm, TorchIndex.DirectMl, TorchIndex.Cpu, TorchIndex.Mps };
if (!supported.Contains(torchVersion)) { /* pick a supported torch index before installing */ }

bool IsSupportedTorchIndex(TorchIndex t) => t is TorchIndex.Cuda or TorchIndex.Rocm or TorchIndex.DirectMl or TorchIndex.Cpu or TorchIndex.Mps;

try { await package.InstallPackage(...); }
catch (NotSupportedException ex) { LetUserPickSupportedGpuIndex(); }

When it happens

Trigger: InstallPackage with a torchVersion that is not one of the five mapped TorchIndex members — e.g. a newly added enum value or a default/uninitialized one.

Common situations: Newer Stability Matrix version introduced a TorchIndex variant that Sdfx's installer doesn't handle yet; corrupted settings producing an out-of-range torch index.

Understand the failure class

Background: Invalid enum value errors: "Unknown type", "Invalid scope", "must be one of" — when a string is not on the library's allowed list — this error's family across 23 libraries.

Related errors

• Not enough space to download
• ComfyUI must be installed to use SwarmUI

AI-assisted analysis of LykosAI/StabilityMatrix@af93d6ef57 (2026-09-12). Data as JSON: /api/errors/c069e4a837911910. Report an issue: GitHub.

Appendix: source

Thrown at StabilityMatrix.Core/Models/Packages/Sdfx.cs:206

                pythonVersion: options.PythonOptions.PythonVersion
            )
            .ConfigureAwait(false);
        venvRunner.UpdateEnvironmentVariables(GetEnvVars);

        progress?.Report(
            new ProgressReport(-1f, "Installing Package Requirements...", isIndeterminate: true)
        );

        var torchVersion = options.PythonOptions.TorchIndex ?? GetRecommendedTorchVersion();

        var gpuArg = torchVersion switch
        {
            TorchIndex.Cuda => "--nvidia",
            TorchIndex.Rocm => "--amd",
            TorchIndex.DirectMl => "--directml",
            TorchIndex.Cpu => "--cpu",
            TorchIndex.Mps => "--mac",
            _ => throw new NotSupportedException($"Torch version {torchVersion} is not supported."),
        };

        await venvRunner
            .CustomInstall(["setup.py", "--install", gpuArg], onConsoleOutput)
            .ConfigureAwait(false);

        if (installedPackage.PipOverrides != null)
        {
            var pipArgs = new PipInstallArgs().WithUserOverrides(installedPackage.PipOverrides);
            await venvRunner.PipInstall(pipArgs, onConsoleOutput).ConfigureAwait(false);
        }

        progress?.Report(new ProgressReport(1, "Installed Package Requirements", isIndeterminate: false));
    }

    public override async Task RunPackage(
        string installLocation,
        InstalledPackage installedPackage,

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