OCCT

restore [locate_data_file bug29481_ex3.brep] s
explode s f

# remove the gaps in each solid
compound s_7 s_8 s_9 gap1
compound s_11 s_12 s_17 gap2

removefeatures res1 s gap1
checkshape res1
checkprops res1 -s 1200 -v 1875
checknbshapes res1 -vertex 19 -edge 31 -wire 15 -face 15 -shell 2 -solid 2
CheckIsFeatureRemoved gap1 {e f}

# check that the common face is still shared
if {![regexp "OK" [bopcheck res1]]} {
  puts "Error: sharing is lost after removal"
}

# get history of the operation
savehistory rf_hist

# check modification of the common face
modified m6 rf_hist s_6
checkprops m6 -s 100

# check modification of the solid 1
explode s
modified m1 rf_hist s_1
checkprops m1 -s 600 -v 1000


removefeatures res2 s gap2
checkshape res2
checkprops res2 -s 1200 -v 1875
checknbshapes res2 -vertex 19 -edge 31 -wire 15 -face 15 -shell 2 -solid 2
CheckIsFeatureRemoved gap2 {e f}

# get history of the operation
savehistory rf_hist2

# check that the common face is still shared
if {![regexp "OK" [bopcheck res2]]} {
  puts "Error: sharing is lost after removal"
}

# check modification of the common face
modified m6 rf_hist2 s_6
checkprops m6 -s 100

# check modification of the solid 1
explode s
modified m2 rf_hist2 s_2
checkprops m2 -s 600 -v 1000