The Scheduler keeps throwing this error, doesn't anyone know what is causing the exception?

AssemblyVersion:7.3.1

DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke

ExceptionGUID:c734e3a1-4452-4a17-b064-ac04033e0472

InnerException:Method not found: 'System.Data.IDataReader DotNetNuke.Data.DataProvider.GetSearchItems(Int32, Int32, Int32)'.

FileName:

FileLineNumber:0

FileColumnNumber:0

Method:DotNetNuke.Services.Search.SearchDataStoreController.GetSearchItems

StackTrace:

Message:

System.MissingMethodException: Method not found: 'System.Data.IDataReader DotNetNuke.Data.DataProvider.GetSearchItems(Int32, Int32, Int32)'.
   at DotNetNuke.Services.Search.SearchDataStoreController.GetSearchItems(Int32 ModuleId)
   at DotNetNuke.Services.Search.SearchDataStore.StoreSearchItems(SearchItemInfoCollection SearchItems)
   at DotNetNuke.Services.Search.SearchEngine.IndexContent(DateTime startDate)
   at DotNetNuke.Services.Search.SearchEngineScheduler.DoWork()

Erik is correct - the 7.3.1 (in AFAIR 7.3.0) version of DotNetNuke.Services.Search.SearchDataStoreController does have GetSearchItems, but it's implementation looks like this:

  [Obsolete("Deprecated in DNN 7.1.2  Implementation changed to return empty result set")]



        public static ArrayList GetSearchItems(int PortalId, int TabId, int ModuleId)



        {



            var empty = new ArrayList();



            return empty;



        }

In other words that the exception you see with the missing method should not apply in 7.3.1 as the code does not contain that method - I suggest you right click the dotnetnuke.dll in your BIN folder and check and see what version it actually is