Question

I have a function that I’m trying to compile, but I’ve been pulling my hair out for the last 30 minutes trying to figure out why this code is giving me a Undeclared free variable error. I’m using Emacs, and cannot decipher why I’m getting this error.

(defun pretty-all(res diff)
  (let* ((v-list (blank-unit-list res))
         (c-list (blank-unit-list res)))
    (complete-fill c-list v-list res (total-res res) diff)
    (format t
            "Resistance is ~S~% Voltage is ~S~% Current is ~S~%"
            res v-list c-list)))

blank-unit-list , complete-fill , total-res are all my custom-defined functions.

I’m pretty sure this error is related to how I structured my code, but as I’ve said before, I can’t figure out what.

---

Copied from Emacs:

3 compiler notes:

CircuitFunctions.lisp:61:64:
  warning: Undeclared free variable RES

CircuitFunctions.lisp:61:70:
  warning: Undeclared free variable V-LIST

CircuitFunctions.lisp:61:81:
  warning: Undeclared free variable C-LIST

Compilation failed.

Answer 1

Following wvxvw’s suggestion that my code might have a missing parens somewhere, I scrolled through my file with C-M-f. It passed through without a problem and by now I was starting to give up. Lastly, just to make sure, I copied the code from this question and replaced my previous function with the one here. Somehow it works now. I don’t know what it was that caused the problem, but it functions correctly now. Thanks everyone for their input.