Extract compressed files into a new folder.ħ. Make sure ftb launcher, and all the mods you want are installed on your computer.Ħ. Go to, and update your java to the latest version.Ĥ. Ill give a brief step by step process of what I did.ġ. Also make sure the EULA is set to TRUE, and not false before installing the server. Make sure you do this BEFORE you download a server and try to run it, otherwise it wont work. Basically just update your java to the latest version and REMOVE OLDER VERSIONS. Hey I had the same issue, but I solved it. Using the serverstart.bat AND the FTBServer.jar I keep getting the following message: It works completely fine when I start it as Singleplayer game (using the Launcher), but if I want to start the server I get an error: I downloaded the Infinity Mod Pack ( for Singleplayer and as Server ) A good detailed paragraph about the problem.Since I am using my home-computer, that's quite easy to answer: Did you add any mods to the server pack?.What version of FTB are you using? (Dont just say latest tell us the version).I am just using the already made-up and given zip-server downloadable via the launcher. Are you using minecraft hosting provider or a dedicated/local server not designed for minecraft?.I am trying to start an Infinity Server, what doesn't work, but I'll explain this problem in detail later in this thread