---
title: ioError
framework: system
role: symbol
role_heading: Type Property
path: system/errno/ioerror
---

# ioError

Input/output error.

## Declaration

```swift
static var ioError: Errno { get }
```

## Mentioned in

Adopting Swift Error Constants

## Discussion

Discussion Some physical input or output error occurred. This error isn’t reported until you attempt a subsequent operation on the same file descriptor, and the error may be lost (overwritten) by subsequent errors. The corresponding C error is EIO.

## See Also

### Device Errors

- [deviceError](system/errno/deviceerror.md)
- [devicePowerIsOff](system/errno/devicepowerisoff.md)
- [inappropriateIOCTLForDevice](system/errno/inappropriateioctlfordevice.md)
- [noSuchAddressOrDevice](system/errno/nosuchaddressordevice.md)
- [notBlockDevice](system/errno/notblockdevice.md)
- [operationNotSupportedByDevice](system/errno/operationnotsupportedbydevice.md)