I have some lens files that I am trying to put into a Non-Sequential system for analysis, but I am struggling to find the right way to do it. 

I tried 2 approaches: 

1. I tried creating a NSC object out of the sequential lens, but I am struggling to put it into my non-sequential system. Copying and pasting the cells doesn’t seem to work, and I don’t want to rebuild my whole NSC system around it. 
2. I also tried creating a lens catalog out of it, but every time I do that, I can an error that says “Entrance pupil cannot be located at object. Check object thickness and stop location”

I have only used non-sequential before so any assistance/explanation of the 2nd point would be helpful. I would also like to know whether the 2nd method is an acceptable way of conducting an analysis (specifically, I am looking to do some self-mixing analysis). On the 1st point, I’m confused if I am missing something simple to put this newly created component in my non-sequential system. 

I have attached the lens file and the non-sequential file that I am talking about in this post. Thanks.