Have you read an alert in bold in my previous post?
Current Page Setup in the file you tested was created in AutoCAD for Windows - that is why my routine works incorrectly.
You need to edit and save current Page Setup for each layout in the drawing, than the routine will work without your interaction.
In theory I can add some code in order to temporary reset Page Setup (plotter name), but nobody can adjust paper sizes which are used in page setups. Unfortunately this is one of the limitations in Windows and Mac versions compatibility.

Maxim