puts "============"
puts "BUC60861"
puts "OCC75"
puts "============"
puts ""
puts "case 2"
###############################
## Incorrect work of section Shell-Shell. 
###############################

restore [locate_data_file BUC60861_gap1.brep] ss 
checkshape ss

plane pl1 25680.2288 21428 9995 1 0 0
mkface f1 pl1 -1 11 -5 5
bsection result ss f1 -a

set good_len 10.0009
regexp { +Edge +: +Min +[-0-9.+eE]+ +Max +([-0-9.+eE]+)} [maxtolerance result] full tol
regexp {Mass +: +([-0-9.+eE]+)} [lprops result] full len
if { [expr 1.*abs(${good_len} - $len)] > $tol } {
   puts "Error : len is bad"
}

set 2dviewer 0