Thanks for the quick replies. I've fixed the problem and am going to share so other ppl don't have to waste an hour like I did.
1) The form field name and the argument name do NOT have to be the same. I named my input field "all" and my argument name "MP3File." 2) When you pass the file name to the CFC you can NOT reference it by the form scope. <cfinvokeargument name="MP3File" value="all"> 3) In your CFC, you must put ## signs around the argument name in filefield. <cffile action="UPLOAD" destination="#expandpath('/UploadedFiles')#/MP3/#val(arguments.copyid)#" filefield="#arguments.MP3File#" nameconflict="MakeUnique"> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:314825 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4