"Symbol's function definition is void: org-agenda-skip-scheduled-if-done"

Question

I've recently started using Org-mode, and when I last restarted Emacs, I got the error message Symbol's function definition is void: org-agenda-skip-scheduled-if-done. Upon opening Emacs again using --debug-init, I get the following backtrace:

Debugger entered--Lisp error: (void-function org-agenda-skip-scheduled-if-done)
  (org-agenda-skip-scheduled-if-done t)
  eval-buffer(#<buffer  *load*> nil "/home/daniel/.emacs.d/init.el" nil t)  ; Reading at buffer position 3069
  load-with-code-conversion("/home/daniel/.emacs.d/init.el" "/home/daniel/.emacs.d/init.el" t t)
  load("/home/daniel/.emacs.d/init" t t)
  #[0 "^H\205\262^@ ;; more stuff after this that wouldn't paste for some reason
  command-line()
  normal-top-level()

This is likely referring to the following line in my init.el file:

(org-agenda-skip-scheduled-if-done t)

If I comment this line out and evaluate it, I get the following backtrace:

Debugger entered--Lisp error: (void-function org-agenda-skip-scheduled-if-done)
  (org-agenda-skip-scheduled-if-done t)
  eval((org-agenda-skip-scheduled-if-done t) nil)
  eval-expression((org-agenda-skip-scheduled-if-done t) nil)
  call-interactively(eval-expression nil nil)

I'm using GNU Emacs 24.3.1 on Ubuntu 14.04.2. I have no idea what's happening. Can anybody help?

Answer 1

That error means that you're trying to call a variable as if it was a function. Use setq to change the value of a variable: (setq org-agenda-skip-scheduled-if-done t)