affaan-m/ECC · error · FalError

fal upload failed; provider details omitted

Error message

fal upload failed; provider details omitted

What it means

FalError raised when the underlying fal client's upload_file() call throws for any reason. The library intentionally omits provider details (network errors, auth failures, API changes) from the message and suppresses the exception chain with `from None`, so the original cause is not surfaced.

Solutions

1. Confirm the fal API key is set and valid (check api_key()/FAL_KEY) before retrying
2. Retry the upload — transient network failures are a common cause
3. Temporarily catch and print the underlying exception by calling _fal().upload_file directly in a debug script
4. Update/verify the fal client package version matches what this script expects

Example fix

// debug: surface the suppressed cause
try:
    url = _fal().upload_file(str(p))
except Exception as e:
    raise FalError(f"fal upload failed: {e}")

import os
key = os.environ.get("FAL_KEY") or os.environ.get("FAL_API_KEY")
if not key:
    raise SystemExit("FAL key not configured")
if not Path(path).is_file():
    raise SystemExit(f"nothing to upload: {path}")

try:
    url = upload(path)
except FalError:
    logging.exception("fal upload failed for %s; check key/network and retry", path)
    raise

When it happens

Trigger: upload() calls _fal().upload_file(str(p)) and any Exception occurs: network outage, invalid or missing FAL API key, provider-side 4xx/5xx, unsupported file type, or SDK version change in the client.

Common situations: Expired or unset FAL_KEY environment variable; corporate proxy blocking uploads to fal.ai; fal client library upgrade that changed upload_file behavior; transient network failure during a large file upload.

Understand the failure class

Background: "API request failed": what wrapped HTTP errors from external APIs mean and how to find the real cause — this error's family across 29 libraries.

Related errors

• fal upload failed; provider details omitted
• fal upload failed; provider details omitted
• fal call failed after one attempt; job acceptance may be…
• fal call failed after one attempt; job acceptance may be…
• no image URL in response from

AI-assisted analysis of affaan-m/ECC@8321021c54 (2026-09-16). Data as JSON: /api/errors/eacd32229028af66. Report an issue: GitHub.

Appendix: source

Thrown at skills/taste-application/scripts/falapi.py:317

    if not p.exists():
        raise FalError(f"cannot upload, file does not exist: {p}")

    key = _cache_key(p)
    with _UPLOAD_LOCK:
        hit = _UPLOAD_CACHE.get(key)
    if hit and (is_dry_run() == hit.startswith(DRY_RUN_HOST + "/")):
        log.debug("upload cache hit: %s", p.name)
        return hit

    if is_dry_run():
        url = f"{DRY_RUN_HOST}/uploads/{_digest(str(key))}/{p.name}"
        log.info("[dry-run] would upload %s (%d bytes) -> %s", p, key[2], url)
    else:
        api_key()
        try:
            url = _fal().upload_file(str(p))
        except Exception:
            raise FalError("fal upload failed; provider details omitted") from None
        log.info("uploaded %s -> %s", p.name, safe_url(url))

    with _UPLOAD_LOCK:
        _UPLOAD_CACHE[key] = url
    return url


def upload_many(paths: Iterable[str | Path]) -> list[str]:
    return [upload(p) for p in paths]


def clear_upload_cache() -> None:
    with _UPLOAD_LOCK:
        _UPLOAD_CACHE.clear()


# ---------------------------------------------------------------------------
# response parsing

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