Round hole not working

When I try to make a round hole through an object, it makes a round rode protruding from both sides of the object. Rhino says, Rhino polysurface object is valid.
the comand was working OK earler, but started doing the opposite of making a hole.

Hi David- most likely, the target object is not closed - try either closing it or run the Flip command to get the normals pointing the other way - any luck?


Thanks the flip direction command worked.