roboflow/supervision · error · RuntimeError

Unimplemented task: {task}

Error message

Unimplemented task: {task}

What it means

Error "Unimplemented task: {task}" thrown in roboflow/supervision.

Source

Thrown at src/supervision/detection/vlm.py:607

        if result == "No object detected.":
            return np.empty((0, 4), dtype=np.float32), np.array([]), None, None

        pattern = re.compile(r"<loc_(\d+)><loc_(\d+)><loc_(\d+)><loc_(\d+)>")
        match = pattern.search(result)
        if match is None:
            raise ValueError(
                f"Expected string to end in location tags, but got {result}"
            )

        w, h = _validate_resolution(resolution_wh)
        xyxy = np.array([match.groups()], dtype=np.float32)
        xyxy *= np.array([w, h, w, h]) / 1000
        result_string = result[: match.start()]
        labels = np.array([result_string])
        return xyxy, labels, None, None

    raise RuntimeError(f"Unimplemented task: {task}")


def _recover_gemini_json_objects(text: str) -> list[Any]:
    """
    Salvage individual JSON objects from a malformed Gemini JSON array.

    Scans for balanced `{...}` spans and parses each independently, keeping the
    ones that decode into a `dict` and skipping the rest. This recovers the valid
    entries from an array that a single `json.loads` would reject wholesale, such
    as one whose objects contain a mid-array syntax error or a missing key.

    Args:
        text: The (fence-stripped) response text that failed `json.loads`.

    Returns:
        The list of successfully parsed objects, which may be empty.
    """
    objects: list[Any] = []

View on GitHub (pinned to 7f254d9784)

Solutions

1. Use a task supported by this VLM connector; check the supported tasks list in the documentation.
2. If the task is valid for the model but unimplemented here, pre-process the raw model output yourself and use the appropriate from_* connector.

When it happens

Trigger: Thrown at src/supervision/detection/vlm.py:607 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of roboflow/supervision@7f254d9784 (2026-08-15). Data as JSON: /api/errors/3309054a05cded81. Report an issue: GitHub.