title: Marie simulator.jar, Operand not defined error
body: <p>Hello I am wondering what I would need to define to get this code to work, I have fixed all the other errors that I ran into earlier however I am unsure about this one. Below is the image with the error, if any more info is needed let me know and I will do my best in order to provide it. I am using MarieSim.jar as well.</p>
  <p><a href="https://i.stack.imgur.com/28xxu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/28xxu.png" alt="enter image description here" /></a></p>