YankeeJim:
He should still be able to restart and play by himself to finish the round. This sounds like a bug caused by others quitting.
It used to but not anymore. We had basically the same thing happen on Cabo last night. WGT went off or something, kicked us both out, then tried to get back in 3 times and got the "We're sorry, there has been an error with the game..." message and both got DQ'd, wouldn't let either of us finish the round as individual players.
It certainly wasn't our computer or ISP either, we were using skype as we played and it never even flinched, well maybe not a lot, it could have when the choice selection of profanities hit the air ;-)