Thanks for your help. I've already tried, same error: 2015-12-26 15:32:26: ACTION[Server]: singleplayer [127.0.0.1] joins game. 2015-12-26 15:32:26: ACTION[Server]: singleplayer joins game. List of players: singleplayer 2015-12-26 15:32:26: ERROR[Main]: ServerError: Runtime error from mod 'armor' in...