I have a problem, I want to merge two large layouts together but when I do, a fatal error comes up if I try scrolling to a certain spot or toward the merge area. What can I do about this? The layouts are Port Clinton to Jim Thorpe and Lehigh Gorge several miles north of Jim Thorpe made by Roon from uslw, and the other layout is Lehigh Gorge to Waverly, NY by me. It's supposed to be a recreation of the Reading and Northern Railroad. The layout by Roon also has all the branch lines as well of the Reading and Northern, and the other layout has the entire Wilkes-Barre area. Could it be that the layouts are too large to merge because I don't have enough system memory? I have 2 GB of RAM.