Electrical System

Right now I am constructing the electrical system for a Boeing 747-400. I have this so far://///////////////////////////////////// // // Nose Wheel Steering // /////////////////////////////////////// - Subsystem entry - batt - Battery - - amp-hour rating - 34 24.0 -- Steering Control -- ster But whenever I try to use it in FLY! 2 I get an error message stating that it can't process next tag line. What does this means and how do I fix it?And, what steps should I take after this? I should get the generators working on each of the engines, right? And then the APU? And about the APU, how best to set it up? I appreciate the answersClear Skies