Traced down the piece missing by entering the location in the PRR Eastern. While that part of the route was merged into the PRR Eastern, the picture...
This type of error can happen after an extended session in the RE. I have seen it happen numerous times on both the PRR Eastern and while working on...
I have found out I like to use mosaic and use the US topomaps(32x32 bits) /photo's(b/w 128x128 bits) as temporary texture. Later you can delete these...