puts "========"
puts "OCC27981"
puts "========"
puts ""
#################################################
# BRepExtrema_DistShapeShape returns not null distance on interfered shapes
#################################################

restore [locate_data_file bug27981_a.brep] a
restore [locate_data_file bug27981_b.brep] b

distmini dd a b
set dist [dval dd_val]
if {$dist > 1.e-7} {
  puts "\nError: invalid distance.\n"
}