Currently Being ModeratedNov 18, 2012 3:13 PM (in response to NLLondon)
I encountered the same issue today. The status on the download claims to be that it had the full thing downloaded, but it said there was an error. I can't force it download again, as I'm getting the same error above. Is there a way to clear the download history and force it to start over?
Currently Being ModeratedNov 30, 2012 6:45 PM (in response to zilvis)
I was able to get it done following a variation of the procedure on this page...
1. Open Terminal
defaults write com.apple.appstore ShowDebugMenu -bool true
3. Relaunch the AppStore
4. Choose the menu item Debug Menu -> Reset App
5. Choose the menu item Debug Menu -> Check for Available Downloads…
Step 4 or 5 isn't available in Mountain Lion so just skip if you don't see the menu option. Anyway, it allowed me to restart the download without error.