Can you cut a part in two?

A very newbie question probably, but I can not figure out how to finish a 2D cutout by cutting a section off it after all else has finished cutting. A more simple way of stating it is I can sketch a 2D rectangle and put a line through the middle, go into manufacture and choose the outside rectangle and the line bisecting it as cut paths, and when I run the simulation it follows the perimeter of the rectangle. The line through the middle is there but the cutter won’t follow or cut it. Am I missing something simple? Thanks