'(= (Counterweight_Frame_Weight ?X) (+ (* 6.2 (- (Counterweight_Between_Guiderails_Value ?X) 1.75)) (+ (* 2 (Counterweight_Frame_Height ?X)) 70)))
;NOTE: It was wrong anyway, it should have read: ; ;(DEFOBJECT CWTFRAMEWEIGHT_CALC (CONSTRAINT CWTFRAMEWEIGHT_CALC) ; (CONSTRAINT.EXPRESSION CWTFRAMEWEIGHT_CALC ; '(= (CWTFRAMEWEIGHT ?X) ; (+ (* 6.2 (- (CWT_BG ?X) 1.75)) ; (+ (* 2 (COUNTERWTFRAMEH ?X)) ; 70)))))