##############################
restore [locate_data_file OCC492a.brep] a_1
-puts [checkshape a_1]
+checkshape a_1
restore [locate_data_file OCC492b.brep] a_2
-puts [checkshape a_2]
+checkshape a_2
if [catch {bfuse result a_1 a_2 } catch_result] {
puts "Faulty OCC492: command FUSE works wrongly"