Dan,
From what our programmers can tell this is a benign issue. The code is still being written for the parts, when you \"Write CNC\". This error is generated when we use a full dato bottom in the drawer boxes. This bug has been documented and will be taken care of in our next build. Just enter through the errors, and run the parts. Everything should be fine. Sorry for the inconvenience.
Note: If you take out all of your Drawer box bottoms, the errors do not show.