Invalid Download File, Please try create package again !

I get the same error message as in the old post above but with Dreamweaver. If I hover over the error symbol I get the text "Invalid Download File, please try create package again." I tried last Tuesday three times and I tried today. I have also tried to package Dreamweaver with other apps as well as on its own. No luck. I was told to try on another machine which I can't do here in the office so I will try at home tonight. However, I'm not convinced this is the issue since i have made other packages at the office before, with Dreamweaver, and had no problems.