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# DeviceActivityCenter.MonitoringError

Errors that may occur when starting to monitor an activity.

```
enum MonitoringError
```

## Topics

### Checking for Errors

[`case excessiveActivities`](/documentation/DeviceActivity/DeviceActivityCenter/MonitoringError/excessiveActivities)

The calling process is monitoring too many activities.

[`case intervalTooLong`](/documentation/DeviceActivity/DeviceActivityCenter/MonitoringError/intervalTooLong)

The activity’s schedule has an interval that is too long.

[`case intervalTooShort`](/documentation/DeviceActivity/DeviceActivityCenter/MonitoringError/intervalTooShort)

The activity’s schedule has an interval that is too short.

[`case invalidDateComponents`](/documentation/DeviceActivity/DeviceActivityCenter/MonitoringError/invalidDateComponents)

The schedule’s date range is invalid.

[`case unauthorized`](/documentation/DeviceActivity/DeviceActivityCenter/MonitoringError/unauthorized)

The calling process isn’t authorized to monitor device activity.

### Getting the Localized Message

[`var errorDescription: String?`](/documentation/DeviceActivity/DeviceActivityCenter/MonitoringError/errorDescription)

A localized message that describes what error occurred.

[`var recoverySuggestion: String?`](/documentation/DeviceActivity/DeviceActivityCenter/MonitoringError/recoverySuggestion)

A localized message that describes how to recover from the failure.

## Relationships

### Conforms To

[`Sendable`](/documentation/Swift/Sendable)

[`Hashable`](/documentation/Swift/Hashable)

[`Error`](/documentation/Swift/Error)

[`LocalizedError`](/documentation/Foundation/LocalizedError)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Equatable`](/documentation/Swift/Equatable)

---

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