Leaf portals saw into leaf Created 20 years ago2003-10-02 10:24:10 UTC by Ijax

I get this error

Warning: Leaf portals saw into leaf

Problem at portal between leaves 17 and 18:
   (380.000 -444.000 152.774)
(368.000 -432.000 128.000)
(368.000 -432.000 128.000)
(368.000 -456.000 128.000)

Guide me towards a good tut or help me here.

Try the glossary

tommy14 has a good explanation on this subject

and have a look at the co-ords given, make sure that there are no overlapping brushes - the most common cause of this error, and complex brushes, such as pipes, or cones are not running into the adjasent walls