Hi, ,---- | ? (lisp-implementation-version) | "Version 1.8-dev-r15032M (LinuxX8664)" | ? (defun foo (x) | (let ((a (cons (setf x 42) x))) | (abs (cdr a)))) | FOO | ? (funcall 'foo 666) | > Error: value #1=(42 . #1#) is not of the expected type NUMBER. `---- -- Eric Marsden