puts "========"
puts "OCC23171"
puts "========"
puts ""
##################################
# Got wrong result after stitching
##################################

restore [locate_data_file bug23171_stitch.brep] a
sewing r 0.000001 a

checkshape r

checknbshapes r -vertex 6 -edge 8

checkmaxtol r -min_tol 0.003