exo-explore/exo · error · ValueError

Invalid size format: '{size_str}'. Expected 'WIDTHxHEIGHT' (

Error message

Invalid size format: '{size_str}'. Expected 'WIDTHxHEIGHT' (e.g., '1024x1024')

What it means

Error "Invalid size format: '{size_str}'. Expected 'WIDTHxHEIGHT' (e.g., '1024x1024')" thrown in exo-explore/exo.

Source

Thrown at src/exo/worker/engines/image/generate.py:41

from exo.shared.types.memory import Memory
from exo.worker.engines.image.distributed_model import DistributedImageModel


def parse_size(size_str: ImageSize) -> tuple[int, int]:
    """Parse size parameter like '1024x1024' to (width, height) tuple."""
    if size_str == "auto":
        return (1024, 1024)

    try:
        parts = size_str.split("x")
        if len(parts) == 2:
            width, height = int(parts[0]), int(parts[1])
            if width > 0 and height > 0:
                return (width, height)
    except (ValueError, AttributeError):
        pass

    raise ValueError(
        f"Invalid size format: '{size_str}'. Expected 'WIDTHxHEIGHT' (e.g., '1024x1024')"
    )


def warmup_image_generator(model: DistributedImageModel) -> Image.Image | None:
    """Warmup the image generator with a small image."""
    with tempfile.TemporaryDirectory() as tmpdir:
        # Create a small dummy image for warmup (needed for edit models)
        dummy_image = Image.new("RGB", (256, 256), color=(128, 128, 128))
        dummy_path = Path(tmpdir) / "warmup.png"
        dummy_image.save(dummy_path)

        warmup_params = AdvancedImageParams(num_inference_steps=2)

        for result in model.generate(
            prompt="Warmup",
            height=256,
            width=256,

View on GitHub (pinned to 21a54c5ea0)

When it happens

Trigger: Thrown at src/exo/worker/engines/image/generate.py:41 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of exo-explore/exo@21a54c5ea0 (2026-08-26). Data as JSON: /api/errors/82cb50dd5e8466b6. Report an issue: GitHub.