puts "========"
puts "0031430: Modeling Data - Offset surfaces on C1 surfaces (with multiplicity equal to degree) may still throw ex-ception"
puts "========"
puts ""

restore [locate_data_file bug31430.brep] s
fixshape r s

checkshape r
checknbshapes r -vertex 6 -edge 8 -wire 6 -face 4 -shell 1 -solid 1