Q: Mavericks will not download from the App store. Repeatedly receive a message that "an error has occurred. Try again"

I have repeatedly tried to download Mavericks from the App store. When attempted from the update tab it fails and instructs me to try again from the Purchases tab. When I try it there, I receive an error message that "an error has occurred" and to try again. I have successfully downloaded other apps (both Apple and third party) but Mavericks won't do it.