Nope. Strangest thing--I had a fairly complex figure still around, made it 'solid when boolean', made a sphere negative (the figure positive), grouped them and nada. I had a .dxf balloon and I did the same--duplicated it, made one positive, one negative, grouped and it worked. Did the same with a cube, worked. Tried to duplicate it and nothing. I'm stumped. But not ever having worked with anything but primitives, didn't know what to expect. Diane B