Ive got a map that I just started and I try to bsp it and it gives me this:
 
 ************ ERROR ************
 Backwards tree volume
 
 
 can somebody tell me what I need to do to fix this?
 
 thanks
  
 
  
  
    Try running Bobtoolz brush cleanup (it's in the plugins menu in earlier GTK versions and in later versions it's the 2 arrows, one blue, one green on the toolbar)
  
 
  
  
    Make sure you didn't make all of your brushes detail. At least the hull of your map should be structural.
  
 
  
  
    oh yeah, I already did that wade, but I think that may be what I did wrong Atolm
 
 Thanks:)