Thanks! Shouldn't (or *forcing* (and (not (typep c 'system))) forced) be instead (or *forcing* (and (not (typep c 'system)) forced) ? Need a test case for that. Sigh. [ François-René ÐVB Rideau | Reflection&Cybernethics | http://fare.tunes.org ] The [classical] liberal, of course, does not deny that there are some superior people - he is not an egalitarian - but he denies that anyone has authority to decide who these superior people are. — F. A. Hayek, "Why I Am Not a Conservative"