restore [locate_data_file bug25926_box.brep] s

set distance 1
offsetparameter 1.e-7 $calcul $type
offsetload s $distance
explode s f
# s_7 s_9
offsetonface s_7 15
offsetonface s_9 15
offsetperform result

checkprops result -v 269568

checknbshapes result -shell 1
