puts "TODO OCC27711 ALL: ERROR: OCC27711 is reproduced. Result of blend operation is WRONG."
puts "TODO OCC27711 ALL: Error: tolerance"
puts "TODO OCC27711 ALL: Faulty shapes in variables faulty_1 to faulty_"
puts "========"
puts "OCC27711"
puts "========"
puts ""
#####################################
# Blend-on-blend corrupts the shape
#####################################

smallview

restore [locate_data_file bug27711.brep] s

clear
display s
fit
xwd $imagedir/${casename}_step_0.png

explode s e
blend r1 s 0.5 s_7 0.5 s_12
set bug_info [string trim [checkshape r1]]
if {$bug_info != "This shape seems to be valid"} {
  puts "ERROR: Problem of test case functionality. Should be additionally investigated."
}
clear
display r1
xwd $imagedir/${casename}_step_1.png

explode r1 e
blend r1 r1 0.5 r1_1 0.5 r1_8
set bug_info [string trim [checkshape r1]]
if {$bug_info != "This shape seems to be valid"} {
  puts "ERROR: Problem of test case functionality. Should be additionally investigated."
}
clear
display r1
xwd $imagedir/${casename}_step_2.png

explode r1 e
blend result r1 0.35 r1_4 0.25 r1_15 0.2 r1_27
set bug_info [string trim [checkshape result]]
if {$bug_info != "This shape seems to be valid"} {
  puts "ERROR: OCC27711 is reproduced. Result of blend operation is WRONG."
}
checkmaxtol result -min_tol 1.e-3
clear
display result
xwd $imagedir/${casename}_step_3.png