server
Finally, Diablo 3′s error code 1 has been revealed to us in what seems to be a massive EU server meltdown. All servers in the EU are down without any warnings and a bit later, we’re hit with another maintenance update. So here it is: Error 1: There was an error creating your own party! [...]
Read the whole article here: http://www.maxfreak.com/diablo3/archives/diablo-3-error-1/