---
metadata:
  - name: generator
    content: Diplodoc Platform v5.50.6
alternate:
  - https://appmetrica.yandex.com/docs/en/sdk/ios/analytics/swift/BacktraceErrorKey.md
  - https://appmetrica.yandex.com/docs/ru/sdk/ios/analytics/swift/BacktraceErrorKey.md
---
> **Documentation Index:** Fetch the complete configuration index at https://appmetrica.yandex.com/docs/en/llms.txt

# BacktraceErrorKey

```swift translate=no
let BacktraceErrorKey: String
```

A key from the `userInfo` dictionary of an `NSError`. It should contain the error backtrace. You can get it using the [Thread.callStackReturnAddresses](https://developer.apple.com/documentation/foundation/thread/1409565-callstackreturnaddresses) methods.

AppMetrica automatically parses the passed value.