Hi! 
So first of all I'm dumb. I don't understand computers much.
I'm trying to use HTTrack to download nissan4u.com/parts which is the only
usable nissan parts catalog for older nissan cars that cross references parts
and actually has older nissans. The site has been frequently offline recently
and I;m worried one day it will just disappear for good. I asked for help
everyone I could and I cannot get it to download on any program I've tried.
Everything throws" unknown error". I've been told by people wiser than me that
the site throws a status:0 instead of status:200, that the port 443 on that
site is dead. That I have to use http and try to slowly download it as
robot.txt asks for 2 second intervals. I've set the delays, tried limiting
connections, ticking "force old HTTP 1.0" and I still get "Error:  "Unknown
error" (0) at link nissan4u.com/parts" and nothing downloads.