[Orgmode] Error When Publishing a Single File

[Ian Barton]

This has been happening for a while. I suspect it's something in my 
settings, but I can't work out what. When I publish a single file, I get 
the following error:

Debugger entered--Lisp error: (wrong-type-argument arrayp nil)
  file-truename(nil)

org-publish-file("/home/ian/nfs/firewall/Documents/org/holiday/holiday.org")
  byte-code("?…
  org-publish-current-file(nil)
  call-interactively(org-publish-current-file)
  org-export(nil)
  call-interactively(org-export)

Publishing a whole project works fine. This is the relevant bit of my 
.emacs:

(require 'org-publish)
(setq org-publish-project-alist
      '(

       ;; ... add all the components here (see below)...
      ("org-notes"
          :base-directory "~/nfs/firewall/Documents/org/"
          :base-extension "org"
          :publishing-directory "~/nfs/firewall/public_html/org/"
          :recursive t
          :publishing-function org-publish-org-to-html
          :headline-levels 4             ; Just the default for this 
project.
          :auto-preamble t
          :auto-index t
          :index-filename "sitemap.org"
          :index-title "Sitemap"
      )

    ("org-static"
          :base-directory "~/nfs/firewall/Documents/org/"
          :base-extension 
"css\\|js\\|png\\|jpg\\|gif\\|pdf\\|mp3\\|ogg\\|swf"
          :publishing-directory "~/nfs/firewall/public_html/org/"
          :recursive t
          :publishing-function org-publish-attachment)

    ("org" :components ("org-notes" "org-static"))


      ))