Help: Connect points with cross referenced lines

Hi, I need some advice for this project. It is an architectural project, where I have slabs within a grid and I want to connect the slab’s points (from one slab’s point to the other slab’s point). The connective line would represent stairs. I tried to deconstruct the points to get the Z values and in order to create a cross reference, I made one list and one shifted list, so that I can later on connect the points with lines. However, in the end, I cannot see any line. Any help is appreciated.

Hi Tom, you should post your file so people can look into it :+1: