# When I join a game, I get a "patch_mp.ff is different from the server" or a similar error. How do I fix this?
Since this is a Peer-to-peer (p2p) game, which means every player is a host. If either you or the selected host did not extract his files properly, for instance if he placed the "From-New" files on an old installation, you will get this error. The only way to fix it is for everyone to use the exact same files.
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