Hey I have been having problems with my goto commands on my vanilla FTB server. I know it is the server because it works in single player but not the server. Only change to FTB server config is CC allow HTTP. Here is the link to the CC forums where there is more info on the problem. So is this a server config error or what?
http://www.computercraft.info/forums2/index.php?/topic/6084-error-nil-and-nil/
http://www.computercraft.info/forums2/index.php?/topic/6084-error-nil-and-nil/