Problem: Viewer silently terminating itself

[Mike Barnes]

I'm using RealVNC 4.1.2 on Windows XP Home. I want the connection to
remain open indefinitely. But I find that after a while the viewer
program terminates with no message. I've monitored it and established
that this termination takes place 8 hours 20 minutes (30000 seconds)
after the connection is established, so it looks deliberate. I've
searched for a setting that I can alter, without success.

Can anyone confirm that this actually is a RealVNC "feature", and tell
me how to get round it?

-- 
Regards
Mike Barnes