fix

script/utility.lua

@@ -633,7 +633,7 @@ end
 function Auxiliary.FOperationCodeFun(code,f,cc,sub,insf)
 	return	function(e,tp,eg,ep,ev,re,r,rp,gc,chkf)
 				if gc then
-					if gc:IsCode(code) or (sub and gc:IsHasEffect(EFFECT_FUSION_SUBSTITUTE)) and g:IsExists(f,cc,gc) then
+					if gc:IsCode(code) or (sub and gc:IsHasEffect(EFFECT_FUSION_SUBSTITUTE)) and eg:IsExists(f,cc,gc) then
 						Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FMATERIAL)
 						local g1=eg:FilterSelect(tp,f,cc,cc,gc)
 						Duel.SetFusionMaterial(g1)