---
title: maximumErrorKey
framework: createml
role: symbol
role_heading: Type Property
path: createml/mlprogress/maximumerrorkey
---

# maximumErrorKey

They key that accesses the maximum error value.

## Declaration

```swift
static let maximumErrorKey: ProgressUserInfoKey
```

## See Also

### Accessing error information

- [rootMeanSquaredErrorKey](createml/mlprogress/rootmeansquarederrorkey.md)
- [validationMaximumErrorKey](createml/mlprogress/validationmaximumerrorkey.md)
- [validationRootMeanSquaredErrorKey](createml/mlprogress/validationrootmeansquarederrorkey.md)