https://www.infopathdev.com:443/blogs/ernesto/archive/2009/10/26/querysharepoint-cannot-derive-a-schema-with-blank-fields.aspxThe QuerySharepoint web service allows you to retrieve data from a SharePoint list. It requires a <query> parameter, which can be built using the QueryBuilder form that comes with DBXL. QueryBuilder allows you to specify the columns you wish toenCommunityServer 2007 SP3 (Build: 31118.962)