affaan-m/ECC · error · ValueError

symlink output is not allowed

Error message

symlink output is not allowed: {path}

What it means

validate_output in blender_prop.py rejects output paths that are, or sit under, a symlink, treating symlinks as a path-escape vector so writes cannot land outside the intended output directory.

Solutions

1. Replace the symlink with a real directory
2. Choose a different output path with no symlinks in its chain

When it happens

Trigger: Thrown at skills/taste-application/scripts/blender_prop.py:108 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of affaan-m/ECC@8321021c54 (2026-09-16). Data as JSON: /api/errors/c9f3f8aeb605ce57. Report an issue: GitHub.

Appendix: source

Thrown at skills/taste-application/scripts/blender_prop.py:108

    peak = max(range(len(zones)), key=lambda i: (zones[i][0] ** 2 + zones[i][2] ** 2))
    L = centres[peak] if peak < len(centres) else 50.0
    # Push L up: this is a LIGHT, not a surface, so it needs to be emissive
    # bright while keeping the measured hue direction.
    return _lab_to_linear_srgb(min(95.0, L * 2.4), zones[peak][0], zones[peak][2])


def validate_settings(frames: int, width: int, height: int, fps: float) -> None:
    for name, value, limit in (("frames", frames, 108000), ("width", width, 16384),
                               ("height", height, 16384), ("fps", fps, 240)):
        if (isinstance(value, bool) or not isinstance(value, (int, float))
                or not math.isfinite(value) or not 1 <= value <= limit
                or (name != "fps" and int(value) != value)):
            raise ValueError(f"{name} must be finite, positive and within {limit}")


def validate_output(path: Path) -> None:
    if any(part.is_symlink() for part in (path, *path.parents)):
        raise ValueError(f"symlink output is not allowed: {path}")
    if path.exists():
        raise ValueError(f"refusing to overwrite existing output: {path}")


def validate_bounds(lower, upper) -> None:
    dimensions = [upper[i] - lower[i] for i in range(3)]
    if (not all(math.isfinite(v) for v in (*lower, *upper))
            or any(v < 0 for v in dimensions) or not 1e-9 < max(dimensions) < 1e12):
        raise ValueError("mesh has invalid or empty geometry bounds")


def camera_distance(radius: float, width: int, height: int) -> float:
    """Fit the original bounding sphere with the original 50 mm / 36 mm camera."""
    horizontal_half = math.atan(36 / (2 * 50))
    vertical_half = math.atan(math.tan(horizontal_half) * height / width)
    return max(radius * math.hypot(3.2, 0.8),
               radius / math.sin(min(horizontal_half, vertical_half)) * 1.05)

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