Posts from The licensed, locally installed game (Stronghold) crashes. Auto-translated

Two computers are connected with a crossover cable. I'm playing Heroes 5, with the second expansion featuring the Stronghold faction. The disc is a licensed copy, and there's only one. First, I load the game on one machine, then I put the disc in the other. (Could this be the problem?)
I can create a local game without any issues. But after playing for about 20-30 minutes, the game always crashes. It displays a message: "The other computer has disconnected." And then, silence.
The network has been checked. DVD files download without any problems. Other games work. At least, over UDP.
I'd like to know if others have experienced similar problems in a similar situation. If not, please let me know. Then I can understand that the situation isn't hopeless.

Well, I don't know, I personally can't help with this, but I suggest you ask someone in the Heroes chat.

Here's something else I noticed. I didn't pay attention to it before. You can only run the server on one machine, and then the second machine connects to it. It doesn't seem to work the other way around for online play. I think it might be the operating system causing this. Although, it's strange that this isn't happening with other games. (For example, Gears of War).