🚀 go-pugleaf

Choosing the story is OK (provided it really is story 1 -- what if you have 16 stories and you want the script to work only on story 7, how will you identify the story?). What I normally do for cases like this is have the user click in the story of interest.

You've gone rather wrong with setting the properties of the tabs. Because you're creating a whole bunch of tabs at once in multiple paragraphs, you either need to set the properties at the same time or cycle through the tabs and set them one at a time afterwards.

This works:

tell application "InDesign 2.0.2"
 set myStory to parent story of selection
 tell every paragraph of myStory
  set myTabs to (make tab stop) as list -- in case there's only one
 end tell
 repeat with myTab in myTabs
  tell myTab
   set position to 56.5
   set alignment to right
   set leader to "-"
  end tell
 end repeat
end tell

This is faster:

tell application "InDesign 2.0.2"
 set myStory to parent story of selection
 tell every paragraph of myStory
  make tab stop with properties {position: 56.5, alignment: right, leader: "-"}
 end tell
end tell

Dave