Hello; sorry to be stubborn, but . . . I just am. I can't help but think that there must be a future for jxa even if it doesn't work perfectly at the moment. So here are some observations in case anyone else has some insights. I found that in the Script Editor, File - Open Dictionary - PhotoLine.app opens a window that shows all the properties and methods. Notably, activeDocument is missing; this may explain why a lot of things don't work: