I've played and updated Pain recently and it seems to work fine for me.  However i check on Pain updates once awhile like every few months for updates and keep it up to date.

However, that error issue occurs to me recently when i tried to update Socom which i havent updated it since i played it when launch.  It'll download like 3/6 and then error etc..

So my conclusion from your error and mine is when a game hasnt been updated in forever and requires massive update then an error is the result? Which doesnt seem so good for anybody thats really late in buying a game that'll have massive updates.

I'm still waiting for the Alpine Environment! ARG! Hurry up, we've been waiting for that for what? over 5-6 months.