![How does PROC FCMP store functions?](https://blogs.sas.com/content/iml/files/2020/08/FCMPStore1-480x336.png)
I got a lot of feedback about my recent article about how to find roots of nonlinear functions by using the SOLVE function in PROC FCMP. A colleague asked how the FCMP procedure stores the functions. Specifically, why the OUTLIB= option on the PROC FCMP statement use a three-level syntax: