Is this a fault of my computer?

 From:  Michael Gibson
1275.5 In reply to 1275.3 
Hi Rudy,

> A planar operation is needed at the base of my rectangular head ...I think that is the problem...

Yup, and that the top pieces are all separate.

The easiest way to get your base closed off is to join all the upper pieces together first, then you can select that object and use Construct / Planar to seal off the bottom.

Construct / Planar can be used either to create a surface through a selection of planar curves, or on a surface object it can place a sealed end cap on.

- Michael