Hi all,When you import data with GeoTilesViewer for the Seattle area then you can get this error.http://forums.avsim.com/user_files/23511.jpghere is a workaround using GeoTilesViewer and the LG tools TAGSEEK and TAGWRITE. It's a bit tricky but all you need is in the zip and it is usable for any megatile in Seattle or Sanfran area.

Thanks agtim - you still seem way ahead of us all! But I would love to use this to flatten the Seattle main airport a bit better.RobD.