OCCT

pload XDE

stepread [locate_data_file bug29481_L3.step] s *

copy s_1 s
explode s f

# remove the square protrusio keeping the spherical one
compound s_2 s_25 s_1 s_4 feature

removefeatures result s feature
checkshape result
checkprops result -s 2392.42 -v 1063.76 -deps 1.e-7
checknbshapes result -vertex 61 -edge 91 -wire 34 -face 33 -shell 1 -solid 1
CheckIsFeatureRemoved feature {e f}