---
title: NEFilterManagerError.configurationStale
framework: networkextension
role: symbol
role_heading: Case
path: networkextension/nefiltermanagererror/configurationstale
---

# NEFilterManagerError.configurationStale

An error code that indicates another process modfied the filter configuration since the last time the app loaded the configuration.

## Declaration

```swift
case configurationStale
```

## Discussion

Discussion This error also occurs if the app tries to save the filter configuration before loading it from the Network Extension preferences the first time after the app launches.

## See Also

### Error codes

- [NEFilterManagerError.configurationInvalid](networkextension/nefiltermanagererror/configurationinvalid.md)
- [NEFilterManagerError.configurationDisabled](networkextension/nefiltermanagererror/configurationdisabled.md)
- [NEFilterManagerError.configurationCannotBeRemoved](networkextension/nefiltermanagererror/configurationcannotberemoved.md)
- [NEFilterManagerError.configurationPermissionDenied](networkextension/nefiltermanagererror/configurationpermissiondenied.md)
- [NEFilterManagerError.configurationInternalError](networkextension/nefiltermanagererror/configurationinternalerror.md)