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# NEFilterManagerError

Error codes specific to filter managers.

```
enum NEFilterManagerError
```

## Topics

### Error codes

[`NEFilterManagerErrorConfigurationInvalid`](/documentation/NetworkExtension/NEFilterManagerError/configurationInvalid)

An error code that indicates the filter configuration is invalid.

[`NEFilterManagerErrorConfigurationDisabled`](/documentation/NetworkExtension/NEFilterManagerError/configurationDisabled)

An error code that indicates the filter configuration isn’t enabled.

[`NEFilterManagerErrorConfigurationStale`](/documentation/NetworkExtension/NEFilterManagerError/configurationStale)

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

[`NEFilterManagerErrorConfigurationCannotBeRemoved`](/documentation/NetworkExtension/NEFilterManagerError/configurationCannotBeRemoved)

An error code that indicates removing the configuration isn’t allowed.

[`NEFilterManagerErrorConfigurationPermissionDenied`](/documentation/NetworkExtension/NEFilterManagerError/configurationPermissionDenied)

An error code that indicates the configuration lacks permission.

[`NEFilterManagerErrorConfigurationInternalError`](/documentation/NetworkExtension/NEFilterManagerError/configurationInternalError)

An error code that indicates an internal configuration error occurred.

## Relationships

### Conforms To

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

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

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

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

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

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

---

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