Why Does Is This Property No Longer Available?

AppleScript
#1

A number of years ago I wrote a Messages application AppleScript and it worked great.

I re-ran the script a week or so ago only to discover the script would not run. The offending part of the code – a noted below – was my attempt to access the Participant property of the Chats class which produced error -1728 is as follows:

tell application "Messages"

   set myChats to chats

   repeat with aChat in myChats
   
      set aParticpant to participants of aChat
      log aParticipant       
   end repeat   
end tell

I was about to give up when I decided to download Script Debugger to see whether it could provide additional insight.

I was shocked how fantastic Script Debugger was at identifying the problem which is illustrated in the attached screen print.

20211209_messaages_participant_screenshot
20211209_messaages_participant_screenshot945×817 239 KB

It is my understanding that the Participant property of the Chat class is no longer accessible / available.

Would very much appreciate responses to the following:

  1. Am I correct that the Participant property of the Chat class is no longer accessible / available?

  2. And, if I am correct, then how / why would this happen and is there a workaround?

Thank you.

PS. Script Debugger is great! I am definitely ditching AppleScript! All I can say is that I wish I would have tried this app earlier, I would have saved tons of time!

#2

What you see depends on the version of macOS, I suspect. Under Monterey, participants are available – but most of the other properties have been removed.

#3

@ShaneStanley , thank you much appreciated.

I am stuck on Catalina because of the age of my MacBook Air but a MacBook Pro is on its way to me so hopefully it will work with Monterey.

Once again, thanks!