---
title: nilParameter
framework: homekit
role: symbol
role_heading: Type Property
path: homekit/hmerror/nilparameter
---

# nilParameter

An error indicating that nil was passed for an operation that does not accept nil.

## Declaration

```swift
static var nilParameter: HMError.Code { get }
```

## See Also

### Detecting parameter errors

- [invalidParameter](homekit/hmerror/invalidparameter.md)
- [missingParameter](homekit/hmerror/missingparameter.md)
- [unconfiguredParameter](homekit/hmerror/unconfiguredparameter.md)