invoke-ai/InvokeAI · error · ExternalProviderRequestError

DashScope async response missing results: {output}

Error message

DashScope async response missing results: {output}

What it means

_parse_async_response, invoked when a polled DashScope task reaches SUCCEEDED status, expects output.results to be a list of image results. If 'results' is missing or not a list, the provider raises ExternalProviderRequestError including the output payload, since a succeeded task without results cannot be processed.

Source

Thrown at invokeai/app/services/external_generation/providers/alibabacloud.py:264

            raise ExternalProviderRequestError(f"DashScope response contained no images: {data}")

        return ExternalGenerationResult(
            images=images,
            seed_used=request.seed,
            provider_request_id=request_id,
            provider_metadata={"model": request.model.provider_model_id},
        )

    def _parse_async_response(
        self,
        output: dict[str, object],
        request: ExternalGenerationRequest,
        request_id: str | None,
    ) -> ExternalGenerationResult:
        """Parse the async task completion response."""
        results = output.get("results")
        if not isinstance(results, list):
            raise ExternalProviderRequestError(f"DashScope async response missing results: {output}")

        images: list[ExternalGeneratedImage] = []
        for result in results:
            if not isinstance(result, dict):
                continue
            url = result.get("url")
            if isinstance(url, str) and url:
                pil_image = self._download_image(url)
                images.append(ExternalGeneratedImage(image=pil_image, seed=request.seed))
                continue
            b64_image = result.get("b64_image")
            if isinstance(b64_image, str) and b64_image:
                pil_image = decode_image_base64(b64_image)
                images.append(ExternalGeneratedImage(image=pil_image, seed=request.seed))

        if not images:
            raise ExternalProviderRequestError(f"DashScope async response contained no images: {output}")

View on GitHub (pinned to 0b6a024f2f)

Solutions

1. Inspect the embedded output payload for the actual results field name used by your model
2. Check whether the model's async API uses a different key (e.g. 'output.video_url' or per-frame fields) and update the parser or move the model to _SYNC_MODELS
3. Pin/verify the DashScope API version implied by external_alibabacloud_base_url
4. Update InvokeAI to pick up provider fixes for schema changes

Example fix

// before
results = output.get("results")
if not isinstance(results, list):
    raise ExternalProviderRequestError(f"DashScope async response missing results: {output}")
// after
results = output.get("results") or output.get("output", {}).get("results")
if not isinstance(results, list):
    raise ExternalProviderRequestError(f"DashScope async response missing results: {output}")

# Only submit async tasks for models confirmed to use the async image-generation API
assert model_id in _ASYNC_MODELS, f"{model_id} not validated for async API"

def has_results(output: dict) -> bool:
    return isinstance(output.get("results"), list)

try:
    result = provider.generate(request)
except ExternalProviderRequestError as e:
    if "missing results" in str(e):
        log.error("Async task SUCCEEDED without results; schema mismatch: %s", e)
    raise

When it happens

Trigger: Task status is SUCCEEDED but output lacks 'results' — DashScope schema drift for the async image-generation endpoint, or a task completed with output fields other than results (e.g. video-style output).

Common situations: Custom external://alibabacloud/<model_id> models whose async responses use a different results field name; DashScope API version changes; intermediate SUCCEEDED states with partial payloads.

Related errors

• DashScope async response contained no images: {output}
• DashScope task {task_id} timed out after {_TASK_POLL_TIMEOUT
• DashScope task poll failed with status {response.status_code
• DashScope response missing output: {data}
• DashScope response missing choices: {data}

AI-assisted analysis of invoke-ai/InvokeAI@0b6a024f2f (2026-08-29). Data as JSON: /api/errors/0599b6d73a1fbeb5. Report an issue: GitHub.