Hey IPSquiggle, in the previous thread you said: "That error is fine, it just means you don't have any open entrances in that world. But yes, it only needs to be run from the server console. After each one there should have been a "Validating..." message as well?" So when I first ran the command I did not get any validating messages, oddly, when I re-run it now I do get them. However there's still a problem with the connection. So I found where you took the DestinationWorld from, and noticed that it changes every time the cave server bounces. I have most recently tried snipping in the correct ID for the current session, but when it attempts to validate the cave_entrance_open connection to the caves world I get the following error back: "[00:20:28]: Validating 7: status: INACTIVE world: 3592438217 available: false" (I got 3592438217 from the most recent restart, in the console it reads "[00:19:31]: [sHARD] Slave 'caves(3592438217)' connected from [LAN] IP: 127.0.0.1[00:19:32]: [sHARD] Slave 'caves(3592438217)' ready![00:19:32]: World '3592438217' is now connected " There is another, possibly-related, oddity on this server. Somehow my server_token.txt got munged, not sure how. Re-loading the server_token.txt and restarting fixed that handily though. I'm not sure how that could be related, but figured it's worth mentioning. I'm attaching the current logs from both servers in case they're useful. ( log (2).txt is the surface master and log (3).txt the cave slave) log (2).txt log (3).txt