Adding ojects to a layer via the properties dialog box, I encountered this error on my XP pro system. In addition, after first selection of properties box in multilayered drawing, it comes up blank and you can force this error by clicking on the dialong box 'select objects' button. In addition, layering seems to be very very quirky, i.e., not letting cut/past from other layers - no color change and cannot turn-off visual display, etc. Anyone else encounter this and a fix?