About Issues When Deleting AutoCAD Objects From a Surface

When trying to remove AutoCAD drawing objects using the Erase command, the surface may not reflect the change.

1. In the Prospector tab, right-click the surface to be modified. Click Properties.
2. In the Definition tab, under Operation Type, clear the Drawing Objects check box, or you can right-click Drawing Objects and click Remove From Definition.
3. When prompted to rebuild the surface, click Yes.

The drawing objects are removed from the surface definition, and the surface is automatically updated.

For more information about how to delete objects from the drawing and the surface at the same time, see To Delete Data From the Surface and the Drawing.