invoke-ai/InvokeAI · error · HTTPException

Failed to get image DTOs

Error message

Failed to get image DTOs

What it means

HTTP 500 raised by POST /images/images_by_names when resolving image names to DTOs throws outside the per-image skip logic. The endpoint intentionally skips individual missing images (deleted between fetch steps), so this error means a broader failure occurred — not a single missing image.

Source

Thrown at invokeai/app/api/routers/images.py:924

        image_service = ApiDependencies.invoker.services.images

        # Fetch DTOs preserving the order of requested names
        image_dtos: list[ImageDTO] = []
        for name in image_names:
            try:
                _assert_image_read_access(name, current_user)
                dto = image_service.get_dto(name)
                image_dtos.append(dto)
            except HTTPException:
                # Skip images the user is not authorized to view
                continue
            except Exception:
                # Skip missing images - they may have been deleted between name fetch and DTO fetch
                continue

        return image_dtos
    except Exception:
        raise HTTPException(status_code=500, detail="Failed to get image DTOs")

View on GitHub (pinned to 0b6a024f2f)

Solutions

1. Check server logs for the underlying exception
2. Split the name list into smaller batches
3. Remove suspect image names (recently deleted) and retry
4. Verify DB integrity; repair or restart if corrupted

// chunk the name list before the batch lookup
const chunks = [];
for (let i = 0; i < imageNames.length; i += 50) chunks.push(imageNames.slice(i, i + 50));

try {
  const dtos = await api.getImagesByNames(names);
} catch (e) {
  if (e instanceof ApiError && e.status === 500) {
    // retry per-chunk; drop names that fail to resolve
  }
}

When it happens

Trigger: POST /api/v1/images/images_by_names when the batch DTO lookup service raises (DB failure) or the outer iteration itself errors, e.g. image_dtos.append path failing on a malformed record.

Common situations: Very large image_names list causing query limits/timeouts; a record corrupted such that even the per-image try/except throws outside it; DB lock contention.

Related errors

• Failed to remove image from board
• Failed to get intermediates
• Failed to delete images
• Failed to star images
• Failed to unstar images

AI-assisted analysis of invoke-ai/InvokeAI@0b6a024f2f (2026-08-29). Data as JSON: /api/errors/2c007f251b7e7384. Report an issue: GitHub.