Caves, unable to resume & generate

I am having this issue too and yes I do believe it stems from having Caves enabled on a server - a completely default Forest world, a Forest world with modified worldgen settings, a Forest world with the mods I usually use, a modified worldgen modded Forest world all work, no caves. A world with Caves enabled will give the "Dedicated Server Failed To Start: There was some sort of trouble starting the server. Please try again." message. Attached: Cluster 1's master and caves server logs.

server_log.txt

server_log.txt

Edited September 28, 2018 by Velasco

Signed. Running into the same issue here.

Starting a new Overworld-only world works fine.
Starting a Master/Caves world, I could not manage so far.

Caves log yells this at me each time I try the latter:
[00:00:21]: Validating portal[10] <-> <nil>[10] (inactive)
[00:00:21]: [Shard] Sending slave information to master...
[00:00:22]: Gameserver logged on to Steam, assigned SteamID [--redacted--]
[00:00:22]: [Shard] Registering in lobby as a slave server...
[00:00:22]: Best lobby region is aws/EU (ping 13); returning lobby-eu.kleientertainment.com
[00:00:23]: [Shard] Error while registering slave server: NOT_IN_DB
[00:00:23]: [Error] Sending startup error to client: Slave lobby write failed
[00:00:23]: [IPC] Signal 'DST_Slave_ErrStartup' opened  #0000079C
[00:00:23]: [IPC] Sending signal... #0000079C
[00:00:24]: [Shard] We have been disconnected from the master. Waiting to reconnect...
[00:00:24]: [IPC] Received shutdown signal.

Meanwhile in the master log:
[00:00:22]: Validating portal[10] <-> <nil>[10] (inactive)
[00:00:22]: Sim paused
[00:00:22]: Didn't find an ideal lobby region; returning default
[00:00:22]: Gameserver logged on to Steam, assigned SteamID [--redacted--]
[00:00:22]: [Shard] Slave Caves(2029128273) connected: [LAN] 127.0.0.1
[00:00:23]: [IPC] Received shutdown signal.

(I manually redacted the SteamID because it seemed like sensitive information to my uneducated eyes. The redacted ID string did not match precisely between caves and master log though. The large number in the 3rd section was slightly different between the two. Not sure if that's important to note, but have it be noted anyway because reasons.)

Thank you for providing the log files. We are looking into the cause.

Changed Status to Fixed