Quote Originally Posted by RavenL View Post
Some people are having problems with their upgrade codes not working. I know mine doesn't work and SE only gives you a generic response about it.
The upgrade code given from Mog Station will only produce an error if you already have downloaded the FFXIV: ARR software, and thus do not need it.
If you're receiving the error, you already have the software it is trying to download for you. More information can be found here.