---
title: WKError.Code.contentRuleListStoreLookUpFailed
framework: webkit
role: symbol
role_heading: Case
path: webkit/wkerror/code/contentruleliststorelookupfailed
---

# WKError.Code.contentRuleListStoreLookUpFailed

An error that indicates a content rule list data store didn’t find a rule list with the specified identifier.

## Declaration

```swift
case contentRuleListStoreLookUpFailed
```

## Discussion

Discussion This error might occur if you previously deleted the rule list.

## See Also

### Errors

- [WKError.Code.unknown](webkit/wkerror/code/unknown.md)
- [WKError.Code.webContentProcessTerminated](webkit/wkerror/code/webcontentprocessterminated.md)
- [WKError.Code.webViewInvalidated](webkit/wkerror/code/webviewinvalidated.md)
- [WKError.Code.javaScriptExceptionOccurred](webkit/wkerror/code/javascriptexceptionoccurred.md)
- [WKError.Code.javaScriptResultTypeIsUnsupported](webkit/wkerror/code/javascriptresulttypeisunsupported.md)
- [WKError.Code.contentRuleListStoreCompileFailed](webkit/wkerror/code/contentruleliststorecompilefailed.md)
- [WKError.Code.contentRuleListStoreRemoveFailed](webkit/wkerror/code/contentruleliststoreremovefailed.md)
- [WKError.Code.contentRuleListStoreVersionMismatch](webkit/wkerror/code/contentruleliststoreversionmismatch.md)
- [WKError.Code.attributedStringContentFailedToLoad](webkit/wkerror/code/attributedstringcontentfailedtoload.md)
- [WKError.Code.attributedStringContentLoadTimedOut](webkit/wkerror/code/attributedstringcontentloadtimedout.md)
- [WKError.Code.javaScriptInvalidFrameTarget](webkit/wkerror/code/javascriptinvalidframetarget.md)
- [WKError.Code.navigationAppBoundDomain](webkit/wkerror/code/navigationappbounddomain.md)
- [WKError.Code.javaScriptAppBoundDomain](webkit/wkerror/code/javascriptappbounddomain.md)
- [WKError.Code.credentialNotFound](webkit/wkerror/code/credentialnotfound.md)
- [WKError.Code.duplicateCredential](webkit/wkerror/code/duplicatecredential.md)