puts "========================"
puts " OCC424 "
puts "(case 1)"
puts "========================"
puts ""

restore [locate_data_file CFE_e_lonfzx.rle] E 
nexplode E f

profile cont S E_10 F 50 -100 X 50 Y -100 X -50
featdprism E cont E_10 10 1 1

if [catch {featperform dprism result E_5 E_6 } catch_result] {
    puts "Faulty OCC424 (case 1): function FEATPERFORM works wrongly"
} else {
    puts "OCC424 OK (case 1): function FEATPERFORM works properly"
}

set square 978236.
set 2dviewer 0