(defun c:test2 ( / ss)(if(setq ss (ssget "_X" ))(foreach en(vl-remove-if ''((x) (not(cdr (assoc 1 (entget x)))))(acet-ss-to-list ss)) ; express tool(if en (entdel en))(princ)) ));p/s: this method is not good practice, just an alternative reference;filter by ssget is the best practice