Well, I’ve run out of things to chase down.
We’ve changed the machine, network, and ISP by moving our server from my hardware to DigDug’s hardware.
In doing so, we’ve also ruled out the O/S and any other software.
We’ve ruled out player files by deleting all player files and the server files in the Multiplayer folder and creating a whole new server with new player files.
We’ve ruled out the mod by completely reinstalling FL and going straight vanilla with zero mods and all new player files.
We’ve ruled out FLAC by running the server with IFSO for a time. Same problems using IFSO.
So, it’s not the hardware, it’s not the software, it’s not the playerfiles, and it’s not the mod.
SOMETHING is causing our server to crash any time we have four plus players online. (This started over a year ago but we could have up to 15 players online before crashing, prior to that we would run 50 without a problem). The server either lags out requiring a restart by FLAC, or it crashes in dalib.dll. Every now and again it crashes in common.dll or in an unknown module, but most frequently it’s in dalib.dll.
I noticed on the Disco forums that a couple years ago they had similar issues related to dalib.dll but when I revived the thread (necro-posting… Bad Robo…), I got a less than helpful, in fact… very rude response.
It’s either incompatible mods that players are running, or something malicious being done. I see no other alternatives.