# E04037 — BroadcastNoAudience

This broadcast has no audience selected, so there is nothing to count or send. Select an audience first.

- **HTTP status**: `422`
- **Type**: `validation_error`
- **Name**: `BroadcastNoAudience`

## What to do

This broadcast has no audience set yet. List your audiences to get an id, set it on the broadcast, then try again.

Operations that resolve this:

- [List audiences](/docs/api/reference/list-audiences)
- [Update a broadcast](/docs/api/reference/update-email-broadcast)

## Related

- [E04xxx — Email sending & delivery](/docs/api/errors/E04xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`

## Related resources

- [Should I use a Bird SDK or call the API directly?](/explained/platform/should-i-use-an-sdk-or-call-the-api-directly) (answer)
- [Build your first integration](/learn/paths/integration) (course)
- [Send your first email](/docs/get-started/send-your-first-email) (docs)

[Get an implementation brief](/learn/workspace?topic=api-basics)