Forums Scripts & Popups What's the problem with this?

alias @notice /dialog -m @notice @notice
dialog @notice {
  title "Notice"
  size -1 -1 130 410
  list 1, 10 10 100 40
  list 2, 10 45 100 65
  if $exists(nsaved.dat) {
    list 3, 10 95 100 50
    list 4, 10 130 100 40
  }
  button "Ok", 5, 20 385 40 20, ok
}