Thanks. Then this entire method is better commented out on Genera by prepending #-genera before its source code. I just pushed a change to ASDF master on gitlab.common-lisp.net. Please try again. —♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http ://fare.tunes.org [A] Computer [programming] language is inherently a pun — [it] needs to be interpreted by both men & machines. — Henry Baker On Fri, Sep 1, 2017 at 5:23 AM, Steven Nunez <steven.nunez@illation.com.hk> wrote:

I see. By modifying the asdf code to read:

;;; Override previous methods (from 3.1.7 and earlier) and add proper error checking.

(defmethod initialize-instance :after ((o operation) &rest initargs &key &allow-other-keys)

(unless (null initargs)

(parameter-error "~S does not accept initargs~%Operation class:~S~%Initargs: ~S" 'operation (class-of 'operation) initargs))))

I get the following as output: