Hi, I cannot, unfortunately, build mcclim on lw. The last form in the file "fix-lispworks.lisp" is causing trouble: (defmethod clim-mop:class-direct-superclasses ((instance (eql *ptype-t-class*))) (list (find-class 'standard-object))) ;; scary.. lw complains: Error: The variable *PTYPE-T-CLASS* is unbound. I am completely new to mcclim, so I am sorry for not backtracing this more properly. Any ideas? Thanks, Peter