Hello!
I am using this interactive navmap http://space.discoverygc.com/navmap/
and there is a link "Post issues/suggestions here ~Space/Error (25.03)" that points to this thread.
So, the problem I found is: there is no Humboldt system on the map. Mining guides say it has some ores, the prints show some jumpholes to Kansas, Vespucci and Puerto Rico, but there is no such system connected to those systems on the navmap.
Thank you who is making this interactive map, it is very extremely helpful!