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# MetricManager.LaunchTaskError

An error that describes a problem that occurred while tracking an extended launch task.

```
struct LaunchTaskError
```

## Discussion

`LaunchTaskError` is delivered to the `onTrackingError` closure passed to [`trackLaunchTask(id:onTrackingError:_:)`](/documentation/MetricKit/MetricManager/trackLaunchTask(id:onTrackingError:_:)-48k2s) or [`trackLaunchTask(id:onTrackingError:_:)`](/documentation/MetricKit/MetricManager/trackLaunchTask(id:onTrackingError:_:)-jnu1). Inspect [`reason`](/documentation/MetricKit/MetricManager/LaunchTaskError/reason-swift.property) to determine the cause:

```swift
await manager.trackLaunchTask(id: "initial-data-load", onTrackingError: { error in
    print("Tracking error for \(error.taskID): \(error.reason)")
}) {
    await loadInitialData()
}
```

## Topics

### Error details

[`let taskID: LaunchTaskID`](/documentation/MetricKit/MetricManager/LaunchTaskError/taskID)

The task ID that caused the error

[`let reason: MetricManager.LaunchTaskError.Reason`](/documentation/MetricKit/MetricManager/LaunchTaskError/reason-swift.property)

The reason for the error

[`enum Reason`](/documentation/MetricKit/MetricManager/LaunchTaskError/Reason-swift.enum)

A value that describes why a launch task tracking operation failed.

## Relationships

### Conforms To

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

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

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

---

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