InfoPath Dev

I used code behind in the end. Private Function searchForDuplicate(ByVal xpNav As XPathNavigator, ByVal xpIterator As XPathNodeIterator) As Boolean Dim findItem As String Dim nodeset As New List(Of String) While xpIterator.MoveNext Dim programme As String = "" xpNav = xpIterator.Current nodeset.Add(xpNav.Value.Trim) End While Dim ...

 After studying this for some time I cannot get this to work. The first part count(/my:myFields/my:group1/my:group2[my:field2 != ""]) > 1 is working ok but I cannot find any working examples of preceding-sibling or following-sibling (. = ../preceding-sibling::my:group2/my:field2 or . = ...