I tried to update my iOS apps today using iTunes and was greeted with this error. Given that I had told iTunes to update all of the 60+ apps it told me were out of date, this was hardly helpful.
There are a lot of things wrong with this error message. First of all, it gives me absolutely no idea which app is not available. Second, I had asked iTunes which apps needed to be updated, and it told me that this Mystery App was out of date. How can it be out of date if it isn't available at all? Third, after telling me that this one application wasn't available, iTunes failed to update the other 60+ applications.
The prospect of manually updating them all was fairly annoying. As I looked through all of
