thank you Rhys,because i'm working around on tso planttrellisvine conversion,so need understand it's function,but i check some TSO bhavs use it like “CT - Can Kill Pests?”,that means this call can safely bypass and i can keep object's functionality into TS1?Nope. It's a special call for TSO that checks if the object has been assigned an entry in the city database - that is, it is possible to put in the user's inventory.