Hi,I get about 10 occurences of the below error in the event log every mid-night. Below also are details of the trace log. Can you tell what may be causing this and how this can be fixed.Some interesting parts from the trace log are:<!--StartFragment-->-Unable to process notification list on root web<!--StartFragment-->-PermissionMask check failed. asking for 0x00000080, have 0x00000000<!--StartFragment-->-PermissionMask check failed. asking for 0x00010000, have 0x00000000EVENT LOG<!--StartFragment-->Event Type: ErrorEvent Source: Office SharePoint ServerEvent Category: Office Server GeneralEvent ID: 7888Date: 2/3/2010Time: 12:00:18 AMUser: N/AComputer: xxDescription:A runtime exception was detected. Details follow.Message: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))Techinal Details:System.UnauthorizedAccessException: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) at Microsoft.SharePoint.SPGlobal.HandleUnauthorizedAccessException(UnauthorizedAccessException ex) at Microsoft.SharePoint.Library.SPRequest.GetMetadataForUrl(String bstrUrl, Int32 METADATAFLAGS, Guid& pgListId, Int32& plItemId, Int32& plType, Object& pvarFileOrFolder) at Microsoft.SharePoint.SPWeb.GetMetadataForUrl(String relUrl, Int32 mondoProcHint, Guid& listId, Int32& itemId, Int32& typeOfObject, Object& fileOrFolder) at Microsoft.SharePoint.SPWeb.GetList(String strUrl) at Microsoft.SharePoint.Publishing.Internal.Store.GetListByUrl(SPWeb web, String listUrlName) at Microsoft.SharePoint.Publishing.Internal.NotificationJobDefinition.<>c__DisplayClass6.<Execute>b__0() at Microsoft.Office.Server.Diagnostics.FirstChanceHandler.ExceptionFilter(Boolean fRethrowException, TryBlock tryBlock, FilterBlock filter, CatchBlock catchBlock, FinallyBlock finallyBlock)TRACE LOG<!--StartFragment-->02/10/2010 00:00:03.41 OWSTIMER.EXE (0x15CC) 0x1924 Windows SharePoint Services General 8xfr Verbose PermissionMask check failed. asking for 0x00000080, have 0x00000000 02/10/2010 00:00:03.41 OWSTIMER.EXE (0x15CC) 0x1924 Windows SharePoint Services General 8xfr Verbose PermissionMask check failed. asking for 0x00010000, have 0x00000000 02/10/2010 00:00:03.41 OWSTIMER.EXE (0x15CC) 0x1924 Windows SharePoint Services General 8e2s Medium Unknown SPRequest error occurred. More information: 0x80070005 02/10/2010 00:00:03.41 OWSTIMER.EXE (0x15CC) 0x1924 Windows SharePoint Services General 0 Verbose Releasing SPRequest with allocation Id {1197B503-7B1B-4A67-B5EA-6199F5B1BF2F} 02/10/2010 00:00:03.41 OWSTIMER.EXE (0x15CC) 0x1924 Office Server Office Server General 900n Critical A runtime exception was detected. Details follow. Message: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) Techinal Details: System.UnauthorizedAccessException: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) at Microsoft.SharePoint.SPGlobal.HandleUnauthorizedAccessException(UnauthorizedAccessException ex) at Microsoft.SharePoint.Library.SPRequest.GetMetadataForUrl(String bstrUrl, Int32 METADATAFLAGS, Guid& pgListId, Int32& plItemId, Int32& plType, Object& pvarFileOrFolder) at Microsoft.SharePoint.SPWeb.GetMetadataForUrl(String relUrl, Int32 mondoProcHint, Guid& listId, Int32& itemId, Int32& typeOfObject, Object& fileOrFolder) at Microsoft.SharePoint.SPWeb.GetList(String strUrl) at Microsoft.SharePoint.Publishing.Interna... 02/10/2010 00:00:03.41* OWSTIMER.EXE (0x15CC) 0x1924 Office Server Office Server General 900n Critical ...l.Store.GetListByUrl(SPWeb web, String listUrlName) at Microsoft.SharePoint.Publishing.Internal.NotificationJobDefinition.<>c__DisplayClass6.<Execute>b__0() at Microsoft.Office.Server.Diagnostics.FirstChanceHandler. 02/10/2010 00:00:03.41 OWSTIMER.EXE (0x15CC) 0x1924 CMS Publishing 8gyi Exception (Watson Reporting Cancelled) System.UnauthorizedAccessException: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) at Microsoft.SharePoint.SPGlobal.HandleUnauthorizedAccessException(UnauthorizedAccessException ex) at Microsoft.SharePoint.Library.SPRequest.GetMetadataForUrl(String bstrUrl, Int32 METADATAFLAGS, Guid& pgListId, Int32& plItemId, Int32& plType, Object& pvarFileOrFolder) at Microsoft.SharePoint.SPWeb.GetMetadataForUrl(String relUrl, Int32 mondoProcHint, Guid& listId, Int32& itemId, Int32& typeOfObject, Object& fileOrFolder) at Microsoft.SharePoint.SPWeb.GetList(String strUrl) at Microsoft.SharePoint.Publishing.Internal.Store.GetListByUrl(SPWeb web, String listUrlName) at Microsoft.SharePoint.Publishing.Internal.NotificationJobDefinit... 02/10/2010 00:00:03.41* OWSTIMER.EXE (0x15CC) 0x1924 CMS Publishing 8gyi Exception ...ion.<>c__DisplayClass6.<Execute>b__0() at Microsoft.Office.Server.Diagnostics.FirstChanceHandler.ExceptionFilter(Boolean fRethrowException, TryBlock tryBlock, FilterBlock filter, CatchBlock catchBlock, FinallyBlock finallyBlock) 02/10/2010 00:00:03.41 OWSTIMER.EXE (0x15CC) 0x1924 CMS Publishing 8gyj Unexpected Unable to process notification list on root web (http://xxx/sites/xx). Exception Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))