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# KernelError.loggingConnectionFailed

`btck_logging_connection_create` returned null.

```
case loggingConnectionFailed
```

## Discussion

Thrown by [`init(callback:)`](/documentation/BitcoinKernel/LoggingConnection/init(callback:)). Usually indicates
that [`disableLogging()`](/documentation/BitcoinKernel/disableLogging()) was already called — logging cannot be
re-enabled for the lifetime of the process after disabling.