(1) (file-mode-spec/warning) Error in File mode specification: Symbol's value as variable is void: AUCTeX-version

Backtrace follows:

  byte-code("..." [AUC-TeX-date AUCTeX-date AUC-TeX-version AUCTeX-version current-load-list nil (byte-code "ÀÁÂÃ#‡" [make-obsolete-variable AUC-TeX-version AUCTeX-version "11.50"] 4) ((wrong-number-of-arguments (byte-code "ÀÁÂ\"‡" [make-obsolete-variable AUC-TeX-version AUCTeX-version] 3))) (byte-code "ÀÁÂÃ#‡" [make-obsolete-variable AUC-TeX-date AUCTeX-date "11.50"] 4) ((wrong-number-of-arguments (byte-code "ÀÁÂ\"‡" [make-obsolete-variable AUC-TeX-date AUCTeX-date] 3))) eval-after-load info (dolist (elt (quote ("TeX" "LaTeX" "ConTeXt" "Texinfo" "docTeX"))) (add-to-list (quote Info-file-list-for-emacs) (cons elt "AUCTeX"))) ad-add-advice hack-one-local-variable (TeX-hack-one-local-variable-after nil t (advice lambda nil "Call minor mode function if minor mode variable is found." (let ((var (ad-get-arg 0)) (val (ad-get-arg 1))) (when (memq var (quote (TeX-PDF-mode TeX-source-specials-mode TeX-interactive-mode TeX-Omega-mode TeX-fold-mode LaTeX-math-mode))) (if (symbol-value val) (funcall var 1) (funcall var 0)))))) after ad-activate-on] 5)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  load-internal("tex" nil nil nil binary)
  # bind (path handler filename nosuffix nomessage noerror file)
  load("tex" nil nil nil)
  # (unwind-protect ...)
  tex-mode()
  # bind (alist mode name keep-going)
  # (unwind-protect ...)
  # bind (just-from-file-name)
  set-auto-mode()
  #<compiled-function nil "...(5)" [set-auto-mode t] 1>()
  # (unwind-protect ...)
  call-with-condition-handler(#<compiled-function (__call_trapping_errors_arg__) "...(17)" [__call_trapping_errors_arg__ errstr error-message-string lwarn file-mode-spec warning "Error in %s: %s\n\nBacktrace follows:\n\n%s" "File mode specification" backtrace-in-condition-handler-eliminating-handler] 8> #<compiled-function nil "...(5)" [set-auto-mode t] 1>)
  # (condition-case ... . ((error)))
  # bind (find-file)
  normal-mode(t)
  # bind (nomodes after-find-file-from-revert-buffer noauto warn error)
  after-find-file(nil t)
  # (unwind-protect ...)
  # bind (inhibit-read-only error number truename rawfile nowarn filename buf)
  find-file-noselect-1(#<buffer "HSAn.tex"> "/Users/artemio/Backup/Papers/Spin CS/HSAn/HSAn.tex" nil nil "/Users/artemio/Backup/Papers/Spin CS/HSAn/HSAn.tex" (4824587 234881026))
  byte-code("..." [number truename rawfile nowarn filename buf set-buffer-major-mode find-file-noselect-1] 7)
  # (condition-case ... . ((t (byte-code "Â!ˆÃ	@	A\"‡" [buf data kill-buffer signal] 3))))
  # bind (number truename buf wildcards rawfile nowarn filename)
  find-file-noselect("/Users/artemio/Backup/Papers/Spin CS/HSAn/HSAn.tex" nil nil nil)
  # bind (wildcards codesys filename)
  find-file("/Users/artemio/Backup/Papers/Spin CS/HSAn/HSAn.tex")
  eval((find-file "/Users/artemio/Backup/Papers/Spin CS/HSAn/HSAn.tex"))
  # (condition-case ... . error)
  # (catch top-level ...)