I can put a block of material in a milling machine and cut ahole with a slot drill which is positioned exactly the cutterradius in fom an edge. This results in zero thickness where thecutter meets at a tangent with the outside edge of the block. OK, Iknow that what you get at the edge is ill-defined and can look amess but the point is that the hole is the correct size and in thecorrect position.

I know that most peoples first response is "why would you want todo that" - but that is not the point. From reading some of theposts in this forum, this failing of SolidWorks causes manyproblems in all sorts of circumstances. There is also the issue of"how does SolidWorks display zero thickness". Well, I would muchrather have a peculiar display abberation than nothing.

BTW, if anybody thinks it can't be done, Inventor does it quitesuccessfully.

Sorry if this seems a bit of a rant but it comes as a result of aseries of error messages for no apparent good reasons - even the'!' OK box. It seems to me that SolidWorks is not blessed with a"can do" attitude.SolidworksParts And Features