[22:02:26] START
[22:02:30] BACKUP OK
[22:02:30] WINDOW0 Sketchup::Group
[22:02:30] BAND0 solid=true
[22:02:30] UNION0 Sketchup::Group
[22:02:30] WINDOW1 Sketchup::Group
[22:02:30] BAND1 solid=true
[22:02:30] UNION1 NilClass
[22:02:30] ERR reference to deleted Group
[22:02:31] END