When I go to multiplayer and click on search when NovaWorld is selected my game crashes and I get an error message Sysdump.txt Saved. I am using windows 7 and I can play the game in single player just fine.

hey i have this message when i try to start the game!! impossible to play now!!! i buy this game 2 days before... yesterday i play, today i can't wtf???

don't buy this game!!! second time i install, i play 1 houre then the game can't be read.

Has anyone solved this issue yet ?

I don't know what DF you guys are talking about, but I got all the DF games available on GOG, some I could play online without any problems, but most of them simply won't work, and would present an error similar to yours.

I could play DF 1 online, and I think land warrior worked well too, but DF2, BHD and TFD I just gave up trying to play online