Emacs ElScreen getting "(wrong-type-argument consp nil)" every time I try to create new window

Question

I enabled debugging by putting "(setq debug-on-error t)" before I initialize ElScreen in my .emacs file, and get the following backtrace:

Debugger entered--Lisp error: (wrong-type-argument consp nil)
elscreen-append-screen-to-history(0)
elscreen-create-internal()
elscreen-create()
call-interactively(elscreen-create nil nil)

To me this suggests that the elscreen-append-screen-to-history function is expecting a non-numeric argument, but I'm not sure. I get this same wrong-type-argument error even when I try evaluating the function with an argument greater than zero. I'm running emacs 24.2.1 and using the ElScreen version available here (the only living link I could find) https://github.com/knu/elscreen.

I initialize ElScreen as follows in my .emacs file: 
;; ---------------------------------------
;; load elscreen
;; ---------------------------------------
(setq debug-on-error t)
(defun load_elscreen ()
  "load elscreen"
  (interactive)
  (add-to-list 'load-path "~/elscreen")
  (load "elscreen" "ElScreen" t)
)

;; F12 enables elscreen
(global-set-key (kbd "<f12>") 'load_elscreen)

;; F9 creates a new elscreen, shift-F9 kills it
(global-set-key (kbd "<f9>") 'elscreen-create)
(global-set-key (kbd "C-c t a b d") 'elscreen-kill)

;; Windowskey+PgUP/PgDown switches between elscreens
(global-set-key (kbd "C-M-_") 'elscreen-previous)
(global-set-key (kbd "C-M-+") 'elscreen-next)

Everything worked fine before I switched to a new version of Fedora, and I'm not sure if I'm using the same version of ElScreen as before or not.

Has anyone gotten this to work, encountered this problem or have any ideas?

---

Answer 1

You need to call elscreen-start. Add this to your load_elscreen, after the call to load:

(elscreen-start)

Answer 2

You need to call elscreen-start. Add this to your load_elscreen, after the call to load:

(elscreen-start)