puts "============================================================================================="
puts "OCC31616: Modeling algorithm - Section between two shells returns wire with gaps (720)"
puts "============================================================================================="
puts ""

restore [locate_data_file bug31616.brep] s

explode s 

bsection sec s_1 s_2

checksection sec -r 2
checknbshapes sec -vertex 69 -edge 68
checkprops sec -l 20.7581