LykosAI/StabilityMatrix · error · InvalidOperationException

No ComfyUI workflows found in

Error message

No ComfyUI workflows found in "{file.Name}" - the file contains neither workflow json nor images with an embedded workflow

What it means

DownloadCivitWorkflowStep.ExecuteAsync throws InvalidOperationException when an archive contains no ComfyUI workflow JSON and no images with an embedded workflow (importedCount == 0 and foundGenerationParametersOnly false). It means the download simply has nothing workflow-like in it.

Solutions

Check the Civitai page for an explicit ComfyUI workflow attachment before downloading
Download the correct file (workflow JSON) directly instead of the archive
Handle InvalidOperationException in the caller and inform the user no workflow exists in this file

Defensive patterns

Strategy: try-catch

Validate before calling

if (!archiveHasWorkflowJson && !archiveHasWorkflowImages) throw new SkipImportException("no ComfyUI workflow in file");

Try / catch

try { await step.ExecuteAsync(progress); } catch (InvalidOperationException ex) { ui.Notify(ex.Message); }

Prevention

Check the Civitai page explicitly lists a ComfyUI workflow
Download the workflow JSON directly when unsure
Pre-scan archives for workflow markers before import

When it happens

Trigger: Calling ExecuteAsync on a downloaded Civitai file where no workflow.json and no workflow-embedding images exist, so zero items are imported.

Common situations: Downloading plain model weights or preview images from Civitai expecting a workflow; wrong archive downloaded; creator removed the workflow attachment.

Understand the failure class

Background: EmptyResultError / "no results found": when an API or scraper succeeds but returns zero rows — this error's family across 9 libraries.

Related errors

AI-assisted analysis of LykosAI/StabilityMatrix@af93d6ef57 (2026-09-12). Data as JSON: /api/errors/c9abee98294a013c. Report an issue: GitHub.

Appendix: source

Thrown at StabilityMatrix.Core/Models/PackageModification/DownloadCivitWorkflowStep.cs:79

                        isMultiple: false
                    )
                    .ConfigureAwait(false)
                    ? 1
                    : 0,
                _ => await ImportWorkflowJsonAsync(
                        await File.ReadAllTextAsync(tempFile).ConfigureAwait(false),
                        fileStem,
                        targetDir,
                        isMultiple: false
                    )
                    .ConfigureAwait(false)
                    ? 1
                    : 0,
            };

            if (importedCount == 0)
            {
                throw new InvalidOperationException(
                    foundGenerationParametersOnly
                        ? $"\"{file.Name}\" contains images with WebUI-style generation parameters, "
                            + "but no embedded ComfyUI workflow - the creator may not have attached "
                            + "the actual workflow to this file"
                        : $"No ComfyUI workflows found in \"{file.Name}\" - "
                            + "the file contains neither workflow json nor images with an embedded workflow"
                );
            }

            progress?.Report(new ProgressReport(1f, $"Imported {importedCount} workflow(s)"));
        }
        finally
        {
            if (tempFile.Exists)
            {
                tempFile.Delete();
            }
        }

View on GitHub (pinned to af93d6ef57)