puts "============"
puts "OCC23706"
puts "============"
puts ""
#########################################################################
# Cannot project point on curve
#########################################################################

cpulimit 1500

bsplinecurve r3 2 6 1 3 2 1 3 1 4 1 5 1 6 3 2 5 3 1 3 7 3 1 4 8 3 1 4 8 3 1 4 8 3 1 5 9 3 1 9 7 3 1
bsplinecurve r4 2 6 2 3 2.5 1 3 1 3.5 1 4 1 4.5 3 -1 2 3 1 1 11 3 1 3 9 3 1 3 9 3 1 3 9 3 1 5 7 3 1 7 4 3 1

set info [extrema r3 r4] 

regexp {Infinite number of extremas, distance = +([-0-9.+eE]+)} $info full dist

if { $dist > 4.0e-13 } {
    puts "Error : Extrema distance is too big"
} else {
    puts "OK: Extrema distance is good"
}