Pan X flags my StartScript statement (imported from a Pan 6 file) as Unknown, but I can’t find this listed in the Unimplemented Statements and Functions list.
I wonder if openanything would work instead of startscript.
There is no startscript statement in Panorama X. And in fact the StartScript statement did not work in Panorama 6 in recent versions of macOS. And by “recent”, I think it has been over a decade since this worked.
Gary’s suggestion of openanything is an interesting one, it’s worth a shot. But the recommended solution is to use the AppleScript statement or function.