Your S" seems to do C". It leaves nothing on the stack in interpret mode, its supposed to leave addr and count, here is pforth S" foo " ok Stack<10> 2498808519657 4 TYPE foo ok Stack<10> online forth <img width="963" height="237" alt="Image" src="https://github.com/user-attachments/assets/ccd923c9-4e5b-4747-bd08-32c176feb8d9" />