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SharePoint 2010 Error (in CoreResultsWebPart::OnInit) when searching

After installing a fresh SharePoint 2010 standard farm I kept on receiving this error when I try to search something in the search center: CoreResultsWebPart::OnInit: Exception initializing: System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart.SetPropertiesOnQueryReader() at Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart.OnInit(EventArgs e) After trying the following actions: ensuring that hotfix 976462 is installed ensuring … Continued

Advance Search webpart, contains is missing

Default the “contains” option is missing in the property select field of the Advance Search Webpart in SharePoint 2007. The reason for this is the hugh load on the SQL server if this option is used to query the SharePoint index. So be careful when adding this option. Add following line <Option Name=”AllowOpContains” Value=”True”/> underneath … Continued

The crawler could not communicate with the server

The crawler could not communicate with the server. Check that the server is available and that the firewall access is configured correctly This is a rather generic error message and I found out that it generally covers problems communicating with the index server, i.e. the target server is responding with a http response code 5xx … Continued