Hello Zemax team,

My question is regarding an error I met when I use a lens black box from lens vendor. As the screenshot below, I have tried to put the object to 1 meter away in front of the lens by adjusting the surface 1 thickness. However, an error as “cannit determine object coordinates” shows up once entered. How to fix this error or what’s the proper method to change the object distance at the black box? Thanks.