IsDefined does not accept array notation. You need to rewrite it using dot notation:
IsDefined("form.rel_#ar#") or IsDefined("form.rel_"& ar) The other option is to use StructKeyExists, which is generally preferred because it is a little more precise than isDefined: structKeyExists(form, "rel_"& ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:356504 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm