https://www.infopathdev.com:443/forums/39.aspxNew to InfoPath? Search to see if your question has already been answered. If it has not, then ask it here or the appropriate topic forum.enCommunityServer 2007 SP3 (Build: 31118.962)https://www.infopathdev.com:443/forums/thread/76920.aspxWed, 28 Mar 2012 12:21:48 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:76920ErnestoM0https://www.infopathdev.com:443/forums/thread/76920.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=39&PostID=76920<p>Hi,</p><p>It sounds like you&#39;re downloading an entire list and them trying to filter in the form.</p><p>Here is some advice from <a href="http://social.technet.microsoft.com/Forums/en-US/sharepoint2010customization/thread/7951d3ca-0614-4f8b-bfdc-49862dccb336/">Clayton Cobb</a> concerning this scenario.</p><p>Hope it helps. <br /></p>https://www.infopathdev.com:443/forums/thread/76903.aspxTue, 27 Mar 2012 16:39:13 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:76903Kazzahere0https://www.infopathdev.com:443/forums/thread/76903.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=39&PostID=76903<p>Hi</p><p>I am creating a form which has cascading drop-down fields and an automatically populated field using filters&nbsp;from an external data source (SharePoint list).</p><p>On previewing the form the first 2 drop-down boxes, though providing the correct lists, state&nbsp;there&nbsp;are&nbsp;validation errors.</p><p>The design checker warns <em>&#39;the filter expression is on external data and could not be validated. It may not be supported in web browser forms&#39;</em> which I don&#39;t know what it means and if this is the stated above.</p><p>I would appreciate any help as I&#39;ve obviously not set something correctly (just when I thought I was getting the hang of cascading) :-)</p><p>Thanks</p><p>Karen</p>