# whatsapp.call_concurrency_limit

> The whatsapp.call_concurrency_limit Problem Details code: This number has too many calls in progress. Try again when one ends.

Source: https://docs.nexafone.so/v1/errors/whatsapp.call_concurrency_limit/

| | |
| --- | --- |
| HTTP status | `429` |
| Area | WhatsApp (from Meta) |
| Problem `type` | `https://docs.nexafone.so/errors/whatsapp.call_concurrency_limit` |

## What the `detail` says

The `detail` explains the occurrence; it can read, for example:

- This number has too many calls in progress. Try again when one ends.

## Handling it

Slow down: wait `Retry-After` seconds, or back off, then retry.

## Example

```json
{
  "type": "https://docs.nexafone.so/errors/whatsapp.call_concurrency_limit",
  "title": "Too Many Requests",
  "status": 429,
  "code": "whatsapp.call_concurrency_limit",
  "detail": "This number has too many calls in progress. Try again when one ends.",
  "requestId": "01J9Z8Q4TQ3W6M5V2X7Y8Z9A0B"
}
```

Match on `code`, never on `detail`: the wording may change. See [Problem Details](/v1/errors/).