When I choose a layout using the built in layout pull-down menu, if I choose any layout further than about half way down, the very last layout is displayed.
I am using FileMaker Pro Advanced 12.0v3 on Windows 7 Professional.
There are 487 layouts.
Any layout from 1 to 255 is displayed correctly when being chosen. Any layout from 256 to 487 displays only layout 487.
This is ONLY when choosing from the built-in pull down layout menu.
There are no problems opening layouts via scripts or programmed buttons.