Window.WaitCursor(1)

scn = Scene.GetCurrent()
ob = scn.getActiveObject()

if not ob or ob.getType() != 'Mesh':
	Draw.PupMenu('Error, no active mesh object, aborting.')
	return

me = ob.getData(mesh=1)
del ob

scn.update()
del scn

Window.Redraw(Window.Types.VIEW3D)

Window.WaitCursor(0)