Sikuli select not working

On win10 64bit, running sikulix2.0.3 as administrator
 The following code does not run

items = ("nothing selected", "item1", "item2",)
selected = select("Please select an item from the list", options = items)
if selected == items[0]:
   popup("You did not select an item")
   exit(1)
if selected == items[1]:
   popup("item 1")
   exit(1)
if selected == items[2]:
   popup("item 2")
   exit(1)

Popup, poperror, popask, input etc seem to be working fine. Have I missed something or is sikuli select bugged?