https://www.infopathdev.com:443/forums/41.aspxIf you're not sure where to ask your question, ask it here. If necessary, our moderators will make sure it gets classified in the correct board.enCommunityServer 2007 SP3 (Build: 31118.962)https://www.infopathdev.com:443/forums/thread/87031.aspxWed, 13 Feb 2013 15:35:03 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:87031Hilary Stoupa0https://www.infopathdev.com:443/forums/thread/87031.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=41&PostID=87031Hi - you&#39;ll need to use a condition on the rule to show the message that uses preceding-sibling. Here&#39;s a <a href="http://www.infopathdev.com/files/folders/examples/entry41102.aspx">link</a> to a sample form with some preceding-sibling formulas that may get you started.https://www.infopathdev.com:443/forums/thread/87027.aspxWed, 13 Feb 2013 13:13:41 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:87027rameshgoudd0https://www.infopathdev.com:443/forums/thread/87027.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=41&PostID=87027Hi All, I have a repeating table, in that one drop down is there with the categories of &#39;a.b,c,d&#39; etc. Think that Initially user selected the &#39;a&#39; category. If he selects the same category again, I have to show a error message. How can I achieve this. Thanks Ramesh D