> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fiddler.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# DatasetWriteUnavailable

> Raised when the item store was unavailable or too slow (HTTP 503 `DatasetItemsWriteUnavailable`). Nothing was written; retry later, or send fewer items. `Dataset.update_items()` retries before raising it.

**New in version 0.8.0**

## Example

```python theme={null}
from fiddler_evals.exceptions import DatasetWriteUnavailable

try:
    dataset = dataset.update_items(items=items).dataset
except DatasetWriteUnavailable:
    ...  # try again later, or send fewer items per call
```

## message

**Type:** `str`

**Value:** `'The dataset item store was unavailable'`

Human-readable error message; this class default is used when none is given.