Make sure the hatch area is closed or has no other other geometric conflicts
(overlapping objects, null nodes, etc.).
If the area is not perfectly closed acad will casting rays to infinity &
beyond trying to find a hatch border. Mapclean and/or overkill may help
clean up drawing object conflicts.
--
John Mayo, PE
Win 7 64, C3D & RD 2010
Core i7 920, 6 GB DDR3
Quadro FX 1700