Delta doesn't work

[Michael de Lang]

Whenever I have a history in the .scm files, the delta shows a dash instead of an actual delta.

scm file:

((title     "Top Gear 2 (SNES)")
 (category  USA%)
 (attempts  6)
 (completed 4)
 (split_names ("Las Vegas" "Los Angeles" "New York" "San Francisco"))
 (golds (
   ((title "Las Vegas")     (duration 2:06.271))
   ((title "Los Angeles")   (duration 2:24.423))
   ((title "New York")      (duration 2:19.256))
   ((title "San Francisco") (duration 2:50.358))))
 (history (
   ((attempt 4)
    (splits (
      ((title "Las Vegas")     (time 2:06.271) (is_gold false))
      ((title "Los Angeles")   (time 4:36.334) (is_gold false))
      ((title "New York")      (time 7:01.173) (is_gold false))
      ((title "San Francisco") (time 9:51.531) (is_gold true)))))
   ((attempt 3)
    (splits (
      ((title "Las Vegas")     (time 4:14.414)  (is_gold false))
      ((title "Los Angeles")   (time 6:38.837)  (is_gold true))
      ((title "New York")      (time 9:07.203)  (is_gold false))
      ((title "San Francisco") (time 11:58.386) (is_gold true)))))
   ((attempt 1)
    (splits (
      ((title "Las Vegas")     (time 2:11.959)  (is_gold false))
      ((title "Los Angeles")   (time 4:52.367)  (is_gold false))
      ((title "New York")      (time 7:27.047)  (is_gold false))
      ((title "San Francisco") (time 10:23.414) (is_gold true)))))
   ((attempt 0)
    (splits (
      ((title "Las Vegas")     (time 2:11.120)  (is_gold true))
      ((title "Los Angeles")   (time 4:48.601)  (is_gold true))
      ((title "New York")      (time 7:07.857)  (is_gold true))
      ((title "San Francisco") (time 10:10.049) (is_gold true))))))))

[rpavlovsky]

I had the same "problem", just add personal best and it'll start working.