Currently Being ModeratedDec 8, 2012 3:31 PM (in response to Bonnieleebooks)
I've seen that error and I think it means you haven't saved the xxx.itmsp file that iTunes Producer edits and uploads. Try command-S before pressing the deliver button.
Currently Being ModeratedDec 15, 2012 1:47 AM (in response to Bonnieleebooks)
I get the same error. Then I find that it iTunes Producer won't let me attach epub file (strange). I mean I add the file - but it won't register it like...