I'm having the same problem others have had. When the game was launched, my friends and I created an online region and we all made cities in it. We occasionally go in and play our individual cities for a while. I was playing my city and added the "Cities of Tomorrow" pack because I had radiation in my city and I wanted to be able to clear it out. I played the city for a couple days and was adding ground scrubbers (which were working). It was nice in that I was finally getting my city clean and could start using the irradiated ground again, but after a couple days, I came across this error and can't get into the city anymore. I can go into my neighbors' cities and view them. And when I look out over the horizon from their cities, I can see OTHER cities, but the area where my city is supposed to be is just empty. It's like nothing was ever built there. I've tried removing the different folders that people have suggested, uninstalling and reinstalling the game, turning off firewalls, and flushing DNS (EA support suggested that, I knew it wouldn't make a difference. I'm a network admin. I know when DNS is acting up). Again, I can go into other cities and see neighbors on the horizon, but my own city shows up blank. Arrrrgh!!!
ID: rcarnevali
Server: North America East 4
Region: TiVopolis
City: Radonville
I have no idea how I exited the city the last time. I may have had a crash on my computer. For some reason, I've been getting a lockup at times. I did notice that Origin updated the next day. I don't see how that could have made a problem, but there was an Origin update. I was really enjoying trying to recover from my nuclear meltdown. I'd like to be able to go back to it. Also, all my friends have neighboring cities. If I leave that region, I won't be playing with them anymore