LykosAI/StabilityMatrix · error · ValidationException

No Clip Type Selected

Error message

No Clip Type Selected

What it means

The Flux dual-CLIP branch also requires an explicit clip type string; when SelectedClipType is null the builder cannot decide between the standard DualCLIPLoader and the GGUF variant, so it throws. Note the guard `SelectedClipType == "flux"` passed, meaning the null case arises when the property holds "flux" but the later local re-read (`SelectedClipType ?? throw`) still treats the nullable as possibly empty.

Solutions

1. Set the Clip Type dropdown (e.g. "flux") in the Model card so SelectedClipType has a value before generating
2. Re-load or repair the workflow/preset that is missing the clip type field
3. If driving programmatically, assign SelectedClipType before invoking the build step

Example fix

// before
var clipType = SelectedClipType ?? throw new ValidationException("No Clip Type Selected");
// after
if (string.IsNullOrEmpty(SelectedClipType))
{
    NotificationHelper.Warn("Select a CLIP type");
    return;
}
var clipType = SelectedClipType;

if (string.IsNullOrEmpty(vm.SelectedClipType))
    throw new InvalidOperationException("Select a Clip Type before building the workflow");

bool HasClipType(ModelCardViewModel vm) => !string.IsNullOrEmpty(vm.SelectedClipType);

try { builder.ApplyStep(e); } catch (ValidationException ex) when (ex.Message == "No Clip Type Selected") { NotifyUser("Choose the CLIP type in the Model card"); }

When it happens

Trigger: Building a Flux workflow when SelectedClipType is null/empty at the point the clipType local is assigned — e.g. the Clip Type dropdown was cleared or never persisted after selecting flux mode.

Common situations: Custom workflows/templates missing the clip type field; binding/serialization of the ViewModel state dropped the selection; user reset the card while remaining in a flux-shaped graph.

Understand the failure class

Background: "missing required argument" and "the following required arguments were not provided": what required-argument errors mean and how to fix them — this error's family across 20 libraries.

Related errors

• No VAE Selected
• No Clip1 Selected
• No Clip2 Selected
• Refiner Model enabled but not selected
• VAE enabled but not selected

AI-assisted analysis of LykosAI/StabilityMatrix@af93d6ef57 (2026-09-12). Data as JSON: /api/errors/40b351bd0cc80119. Report an issue: GitHub.

Appendix: source

Thrown at StabilityMatrix.Avalonia/ViewModels/Inference/ModelCardViewModel.cs:1692

            e.Builder.Connections.Base.Model = modelSamplingSd3.Output;
        }

        var vaeLoader = e.Nodes.AddTypedNode(
            new ComfyNodeBuilder.VAELoader
            {
                Name = e.Nodes.GetUniqueName(nameof(ComfyNodeBuilder.VAELoader)),
                VaeName = SelectedVae?.RelativePath ?? throw new ValidationException("No VAE Selected"),
            }
        );
        e.Builder.Connections.Base.VAE = vaeLoader.Output;

        if (SelectedClipType == "flux")
        {
            // DualCLIPLoader (GGUF variant can also load .safetensors, so any gguf pick routes there)
            var clipName1 = SelectedClip1?.RelativePath ?? throw new ValidationException("No Clip1 Selected");
            var clipName2 = SelectedClip2?.RelativePath ?? throw new ValidationException("No Clip2 Selected");
            var clipType = SelectedClipType ?? throw new ValidationException("No Clip Type Selected");

            e.Builder.Connections.Base.Clip = AnyClipIsGguf(SelectedClip1, SelectedClip2)
                ? e
                    .Nodes.AddTypedNode(
                        new ComfyNodeBuilder.DualCLIPLoaderGGUF
                        {
                            Name = e.Nodes.GetUniqueName(nameof(ComfyNodeBuilder.DualCLIPLoaderGGUF)),
                            ClipName1 = clipName1,
                            ClipName2 = clipName2,
                            Type = clipType,
                        }
                    )
                    .Output
                : e
                    .Nodes.AddTypedNode(
                        new ComfyNodeBuilder.DualCLIPLoader
                        {
                            Name = e.Nodes.GetUniqueName(nameof(ComfyNodeBuilder.DualCLIPLoader)),

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