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# PaymentCardReaderError.readerBusy

An error that indicates the card reader is busy.

```
case readerBusy
```

## Discussion

This error can occur when the system is unable to prepare the card reader
because the device is already being configured.
Try to prepare the card reader again by calling the
[`prepare(using:)`](/documentation/ProximityReader/PaymentCardReader/prepare(using:)) method.

---

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