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/2008.aspxMon, 20 Mar 2006 09:33:24 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:2008Coita Thierry0https://www.infopathdev.com:443/forums/thread/2008.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=39&PostID=2008Hi,<br /><br />Are you sure that you don't have a / at the end of the namespace?<br /><br />like this:<br />xmlns:tns=""http://xxx/CDS/wsSAPLookup/"" <br /><br />One times I have forget and that didn't work anymore :)<br /><br />Thierryhttps://www.infopathdev.com:443/forums/thread/1191.aspxFri, 10 Mar 2006 00:04:47 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:1191dada0https://www.infopathdev.com:443/forums/thread/1191.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=39&PostID=1191Hi,<br />I'm trying to add a rule to a textbox that gets data from my secondary datasource but I keep getting this error:<br /><br /><b>Reference to undeclared namespace prefix: 'tns'.</b><br /><br />I have my namespaces declared like so :<br /><b><br />XDocument.DOM.setProperty "SelectionNamespaces", "xmlns:s0=""http://xxx/CDS/wsSAPLookup"" xmlns:tns=""http://xxx/CDS/wsSAPLookup"" xmlns:dfs=""http://schemas.microsoft.com/office/infopath/2003/dataFormSolution"" xmlns:my=""http://schemas.microsoft.com/office/infopath/2003/myXSD/2006-01-08T22:33:58"""<br /></b><br /><br />What's puzzling is I am already using this second data source to put values in a drop list and I'm not getting any errors with that.<br /><br />Any ideas ?