VXL Q: Wire Editing Set-Up: "Can not get the master routing

[Edward]

I'm trying to get wire-editing working with a set-up that had no rules
file. I followed the directions for putting one together. This means
I filled out "Layers," "Vias," & "Boundary Layers." I didn't add
anything to "Equivalent Layers," "Keepouts," or "Conductors,"
however. So now when I choose any wire-editing command, I get this
"*WARNING* Can not get the master routing layer."

Anyone have any ideas what might be tripping VXL up?

Thanks in advance,

Edward