# Important2: If you play the mod online, also in singleplayer, Steam will check the files, and will consider the file in the battle_preferences (contained in the roaming S2 folder), which is not compatible with vanilla.
This can lead to the error-message "S2 doesn't work anymore".
It makes no real harm though, the mod still works normally, but maybe vanilla makes issues for a next start.
Solution: Prior to your next mod/game start offline, open the battle_preferences file and delete the contained file. This is no problem, it won't change anything, except that the error-message disappears.
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