Strange results...

Note that the number of points input to the qhull need to be 3 or more, and should be an integer, (not
having a decimal point.) Otherwise, on two computer systems, home and work, the slider behaved weirdly, with mouse motion above or below the slider,
the slider would move, and weird exceptions occured. With 3+ integer number of points, the slider works fine.
So set the slider minimum to 3, and have no decimals, in its info box.

Getting your error sounds strange.

- Brian