# sii_unavailable (/en/docs/errores/sii_unavailable)

The SII did not answer, or answered a transport error.

|                |                                                                        |
| -------------- | ---------------------------------------------------------------------- |
| **Code**       | `sii_unavailable`                                                      |
| **Type**       | `rejection` — An SII rejection reason                                  |
| **HTTP**       | none — this is not a response, it travels inside `rejection_reasons[]` |
| **Retriable?** | **Yes**                                                                |

## What to do [#what-to-do]

Genuinely transient. We re-authenticate and retry; you rarely see it.

> **Note**
>
> Transient. Retrying the same document may end up accepted.

## Where it shows up [#where-it-shows-up]

Inside `rejection_reasons[]` of a document in `rejected` or `reparo`, next to the raw SII code and to `retriable`. Never as an HTTP status.

## See also [#see-also]

- [Every code](/en/docs/errores/codigos): The full table, grouped by where you will run into it.

- [The error envelope](/en/docs/errores): The nine types, the request_id and how to handle them in practice.

The machine-readable copy of this page lives at `GET /v1/error_codes`, unauthenticated.