The FTB Forum is now read-only, and is here as an archive.
To participate in our community discussions, please join our Discord! https://ftb.team/discord
You will need to post a console log. If minecraft closes if you get a crash then go to the options in the launcher and turn on 'reopen launcher after exiting minecraft'. Now if a crash happens the launcher will reopen and on the console is a button that says 'paste my log to pastebin.com. When you get the log link it here. If it is not a crash then follow the steps in the guide below.