microsoft/aspire · error · InvalidOperationException

Submitted files for input

Error message

Submitted files for input '{inputName}' do not match the completed uploads.

What it means

When the dashboard marks uploaded files as accepted for an interaction input, every submitted file ID must exist in the upload store for that interaction. A file ID that is unknown to the store means the submitted file set does not match what was actually uploaded, so validation fails.

Solutions

Have the client re-upload the files and submit only the file IDs returned by the current upload flow
Verify the interactionId matches the one under which the files were uploaded
Clear client-side cached file references after each interaction completes

Defensive patterns

Strategy: validation

Validate before calling

// client-side: only submit IDs obtained from the upload API of the same interaction
if (!uploadedIds.every(id => currentInteractionUploadIds.has(id))) await reuploadFiles();

Try / catch

try { await submitFiles(interactionId, inputName, fileIds); } catch (FileMismatchException) { await reuploadFiles(); }

Prevention

Clear cached file IDs after each interaction completes
Never reuse file IDs across interactions or page loads
Re-upload rather than resubmit when in doubt

When it happens

Trigger: Calling MarkFilesAccepted (via ResolveValidateAndMarkFiles from the dashboard submission path) with a fileIds list containing an ID that was never registered for that interactionId.

Common situations: Stale/duplicated client state resubmitting old file IDs, IDs from a different interaction, page refresh causing the client to resend identifiers whose store entries were cleared.

Understand the failure class

Background: 'Could not be found', 'does not exist', 'not found in database': the resource-not-found family when an ID, slug, key, or URI lookup comes back empty — this error's family across 20 libraries.

Related errors

AI-assisted analysis of microsoft/aspire@25830f84bd (2026-09-16). Data as JSON: /api/errors/927874992a418481. Report an issue: GitHub.

Appendix: source

Thrown at src/Aspire.Hosting/Dashboard/InteractionFileUploadStore.cs:158

                {
                    files.Add(new InteractionFileUpload(fileId, entry.OriginalFileName, entry.TempFile.Path));
                }
            }
        }

        return files;
    }

    /// <summary>
    /// Marks validated uploads as accepted into the interaction result.
    /// </summary>
    public void MarkFilesAccepted(int interactionId, string inputName, IReadOnlyList<string> fileIds)
    {
        foreach (var fileId in fileIds)
        {
            if (!TryGetEntry(interactionId, fileId, out var entry))
            {
                throw CreateFileMismatchException(inputName);
            }

            lock (entry)
            {
                if (entry.State is not (FileEntryState.Uploaded or FileEntryState.Accepted) ||
                    !string.Equals(entry.InputName, inputName, StringComparisons.InteractionInputName))
                {
                    throw CreateFileMismatchException(inputName);
                }

                entry.State = FileEntryState.Accepted;
            }
        }
    }

    /// <summary>
    /// Removes a file entry and deletes the associated file on disk.
    /// </summary>

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