Actually, that doesn't mean something is missing - it means something is being loaded twice, in that case once by the server and once by the client.
Interesting. Looking at the server versions of other FH2 maps, they seem to be just stripped down versions of the client files. Basically, instead of having both client.zip and server.zip, there's only server.zip. I tried removing all the client related files for one of the maps but it didn't help.
Do you run the latest version of the map pack?
I think so. I downloaded the pack around the time you last updated it on May 13, and the same files are on the server as are on my client. But how can I tell from looking at the files whether they are current? I don't really want to download them all again just to find that they are identical.
I ran into these errors after initial release but iirc I fixed all of them, at least for my personal dedicated server launched out of the original game folder it works. Unfortunatly as for advanced Ded Server hosting, my knowledge is very limited, therefore I was never able to test in that framework or release a guide to install it properly.
I don't think there's much difference between running a dedicated server from a client folder and running a dedicated server from a separate, non-client install. Hopefully someone who understands these things better will see this and provide some clues. I do know that server installs are lighter, as they don't include any client files (mod-global and map-specific), but that's about all I know for sure.
if you want to fix this, try toying around with the [mapname]/server.zip/ClientArchives.con and [mapname]/server.zip/ServerArchives.con files. They are most likely responsible.
Okay, I'll poke around in those files. I also plan to compare the working map (Pegasus Coop) with the non-working ones to see if that reveals anything.
EDIT: What came to my mind, since the map pack heavily relies on FHT/WaW content - this error may very likely appear if the FHT/762/WaW CMP is installed.
Nope, that's not it. None of those things are installed on my client or server.