[Jprogramming] require 'plot' -> script not found though package installed?

[Ray Zhao]

Hi, I have decided to use the labs to help me learn, and so far they're
really helpful. ^u^
The second chapter requires plot.ijs, and I have that installed in
\j801\graphics\plot, but it gives the error:
not found: C:/Program Files/j801/graphics/afm/afm

|file name error: script

| 0!:0 y[4!:55<'y'

Which is interesting, because that made it look like it was installed in
the wrong folder. Thus, I copied the ijs over to that directory (by
creating folders called afm) but I still got that error message. Anyone
sure about what's wrong here?