---
title: "assessmentSession(_:failedToBeginWithError:)"
framework: automaticassessmentconfiguration
role: symbol
role_heading: Instance Method
path: "automaticassessmentconfiguration/aeassessmentsessiondelegate/assessmentsession(_:failedtobeginwitherror:)"
---

# assessmentSession(_:failedToBeginWithError:)

Tells the delegate that the session failed to start.

## Declaration

```swift
optional func assessmentSession(_ session: AEAssessmentSession, failedToBeginWithError error: any Error)
```

## Parameters

- `session`: The session that failed to start.
- `error`: An error that provides information about why the session failed.

## Discussion

Discussion After your app calls a session’s begin() method, the session asynchronously disables the appropriate system services and then calls its delegate’s assessmentSessionDidBegin(_:) method. However, if the session fails to start for any reason, it calls the assessmentSession(_:failedToBeginWithError:) method instead. Don’t start any assessments if your app receives this callback.

## See Also

### Responding to session start and stop

- [assessmentSessionDidBegin(_:)](automaticassessmentconfiguration/aeassessmentsessiondelegate/assessmentsessiondidbegin(_:).md)
- [assessmentSession(_:wasInterruptedWithError:)](automaticassessmentconfiguration/aeassessmentsessiondelegate/assessmentsession(_:wasinterruptedwitherror:).md)
- [assessmentSessionDidEnd(_:)](automaticassessmentconfiguration/aeassessmentsessiondelegate/assessmentsessiondidend(_:).md)