I read all the documentation and I can’t find what’s wrong. I’m using NSPopUpButton
tell application "iCal" to set CalNames to name of every calendar as list
tell popup button "chooseCalendar" of box "prefsBox" of window "prefsWindow"
--delete every menu item of menu
repeat with itemName in CalNames
make new menu item at the end of menu items with properties {name:itemName, title:itemName, enabled:true}
end repeat
end tell