Remember to cover the basics, that is, what you expected to happen and what in fact did happen. You don't know how to make a good report? See
https://orgmode.org/manual/Feedback.html#Feedback Your bug report will be posted to the Org mailing list. ------------------------------------------------------------------------ When exporting a LaTeX beamer presentation as an asynchronous process (by using C-a prior to selecting the export option), the export fails with the following error: (error "Unknown \"nil\" back-end: Aborting export") This does not occur when exporting the same buffer to HTML or to standard LaTeX. What should happen is that the export occurs in the background just as it would when run in the foreground. This is especially frustrating if org-export-in-background is set to t by default. Details of my setup are below: Emacs : GNU Emacs 28.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.30, cairo version 1.16.0) Package: Org mode version 9.5.3 (9.5.3-g4197fc @ /home/thomas/.emacs.d/straight/build/org/) current state: ============== (setq org-link-elisp-confirm-function 'yes-or-no-p org-directory "~/Dropbox/gtd" org-cite-insert-processor 'citar org-hide-emphasis-markers t org-bibtex-headline-format-function #[257 "\300\236A\207" [:title] 3 "\n\n(fn ENTRY)"] org-log-into-drawer t org-agenda-files '("~/Dropbox/gtd") org-persist-after-read-hook '(org-element--cache-persist-after-read) org-refile-targets '((org-agenda-files :maxlevel . 3)) org-export-before-parsing-hook '(org-attach-expand-links) org-cycle-tab-first-hook '(org-babel-hide-result-toggle-maybe org-babel-header-arg-expand) org-default-notes-file "~/Dropbox/gtd/inbox.org" org-refile-use-outline-path 'file org-publish-timestamp-directory "/home/thomas/.emacs.d/var/org/timestamps/" org-archive-hook '(org-attach-archive-delete-maybe) org-cite-follow-processor 'citar org-odt-format-inlinetask-function 'org-odt-format-inlinetask-default-function org-ascii-format-drawer-function #[771 "\207" [] 4 "\n\n(fn NAME CONTENTS WIDTH)"] org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-show-empty-lines org-cycle-optimize-window-after-visibility-change) org-persist-before-read-hook '(org-element--cache-persist-before-read) org-font-lock-set-keywords-hook '(doom-themes-enable-org-fontification) org-modules '(ol-bbdb ol-bibtex ol-docview ol-doi org-habit) org-mode-hook '(#[0 "\301\211\207" [imenu-create-index-function org-imenu-get-tree] 2] org-superstar-mode visual-line-mode turn-on-flyspell #[0 "\300\301\302\303\304$\207" [add-hook change-major-mode-hook org-fold-show-all append local] 5] #[0 "\300\301\302\303\304$\207" [add-hook change-major-mode-hook org-babel-show-result-all append local] 5] org-babel-result-hide-spec org-babel-hide-all-hashes olivetti-mode mixed-pitch-mode org-eldoc-load) org-babel-load-languages '((awk . t) (calc . t) (css . t) (emacs-lisp . t) (eshell . t) (gnuplot . t) (dot . t) (latex . t) (ledger . t) (octave . t) (plantuml . t) (R . t) (sed . t) (shell . t)) org-id-locations-file "/home/thomas/.emacs.d/var/org/id-locations.el" org-latex-format-drawer-function #[514 "\207" [] 3 "\n\n(fn _ CONTENTS)"] org-latex-format-headline-function 'org-latex-format-headline-default-function org-confirm-shell-link-function 'yes-or-no-p org-html-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"] outline-isearch-open-invisible-function 'outline-isearch-open-invisible org-stuck-projects '("+project/-MAYBE-DONE" ("NEXT" "TODO") nil "\\<IGNORE\\>") org-startup-indented t org-latex-classes '(("beamer" "\\documentclass[presentation]{beamer}" ("\\section{%s}" . "\\section*{%s}") ("\\subsection{%s}" . "\\subsection*{%s}") ("\\subsubsection{%s}" . "\\subsubsection*{%s}")) ("article" "\\documentclass[11pt]{article}" ("\\section{%s}" . "\\section*{%s}") ("\\subsection{%s}" . "\\subsection*{%s}") ("\\subsubsection{%s}" . "\\subsubsection*{%s}") ("\\paragraph{%s}" . "\\paragraph*{%s}") ("\\subparagraph{%s}" . "\\subparagraph*{%s}")) ("report" "\\documentclass[11pt]{report}" ("\\part{%s}" . "\\part*{%s}") ("\\chapter{%s}" . "\\chapter*{%s}") ("\\section{%s}" . "\\section*{%s}") ("\\subsection{%s}" . "\\subsection*{%s}") ("\\subsubsection{%s}" . "\\subsubsection*{%s}")) ("book" "\\documentclass[11pt]{book}" ("\\part{%s}" . "\\part*{%s}") ("\\chapter{%s}" . "\\chapter*{%s}") ("\\section{%s}" . "\\section*{%s}") ("\\subsection{%s}" . "\\subsection*{%s}") ("\\subsubsection{%s}" . "\\subsubsection*{%s}")) ) org-plantuml-jar-path "/home/thomas/.emacs.d/plantuml/plantuml.jar" org-odt-format-headline-function 'org-odt-format-headline-default-function org-export-in-background t org-agenda-before-write-hook '(org-agenda-add-entry-text) org-babel-tangle-lang-exts '(("sed" . "sed") ("latex" . "tex") ("awk" . "awk") ("emacs-lisp" . "el") ("elisp" . "el")) org-src-mode-hook '(org-src-babel-configure-edit-buffer org-src-mode-configure-edit-buffer doom-modeline-set-org-src-modeline) org-confirm-elisp-link-function 'yes-or-no-p org-tags-exclude-from-inheritance '("project") org-cite-activate-processor 'citar org-todo-keywords '((sequence "TODO(t)" "WAITING(w)" "|" "DONE(d)" "CANCELED(c)") ) org-speed-command-hook '(org-speed-command-activate org-babel-speed-command-activate) org-html-format-inlinetask-function 'org-html-format-inlinetask-default-function org-clock-persist-file "/home/thomas/.emacs.d/var/org/clock-persist.el" org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default org-odt-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"] org-persist-directory "/home/thomas/.emacs.d/var/org/persist/" org-fold-core-isearch-open-function 'org-fold--isearch-reveal org-latex-format-inlinetask-function 'org-latex-format-inlinetask-default-function org-persist-before-write-hook '(org-element--cache-persist-before-write) org-tab-first-hook '(org-babel-hide-result-toggle-maybe org-babel-header-arg-expand) org-link-shell-confirm-function 'yes-or-no-p org-babel-pre-tangle-hook '(save-buffer) org-agenda-loop-over-headlines-in-active-region nil org-agenda-start-on-weekday nil org-todo-keyword-faces '(("TODO" . org-warning) ("WAITING" . "yellow") ("CANCELED" :foreground "blue" :weight bold) ("DONE" . org-done)) org-cite-global-bibliography '("~/bib/bib.bib") org-occur-hook '(org-first-headline-recenter) org-metadown-hook '(org-babel-pop-to-session-maybe) org-link-parameters '(("attachment" :follow org-attach-follow :complete org-attach-complete-link) ("doi" :follow org-link-doi-open :export org-link-doi-export) ("docview" :follow org-docview-open :export org-docview-export :store org-docview-store-link) ("bibtex" :follow org-bibtex-open :store org-bibtex-store-link) ("bbdb" :follow org-bbdb-open :export org-bbdb-export :complete org-bbdb-complete-link :store org-bbdb-store-link) ("id" :follow org-id-open) ("file+sys") ("file+emacs") ("shell" :follow org-link--open-shell) ("news" :follow #[514 "\301\300\302Q\"\207" ["news" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("mailto" :follow #[514 "\301\300\302Q\"\207" ["mailto" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("https" :follow #[514 "\301\300\302Q\"\207" ["https" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("http" :follow #[514 "\301\300\302Q\"\207" ["http" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("ftp" :follow #[514 "\301\300\302Q\"\207" ["ftp" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("help" :follow org-link--open-help :store org-link--store-help) ("file" :complete org-link-complete-file) ("elisp" :follow org-link--open-elisp)) org-html-format-headline-function 'org-html-format-headline-default-function org-metaup-hook '(org-babel-load-in-session-maybe) org-refile-allow-creating-parent-nodes 'confirm org-latex-pdf-process '("pdflatex -interaction nonstopmode -output-directory %o %f" "biber %b" "pdflatex -interaction nonstopmode -output-directory %o %f" "pdflatex -interaction nonstopmode -output-directory %o %f") org-outline-path-complete-in-steps nil org-tags-column 0 org-src-lang-modes '(("redis" . redis) ("php" . php) ("arduino" . arduino) ("plantuml" . plantuml) ("C" . c) ("C++" . c++) ("asymptote" . asy) ("bash" . sh) ("beamer" . latex) ("calc" . fundamental) ("cpp" . c++) ("ditaa" . artist) ("desktop" . conf-desktop) ("dot" . fundamental) ("elisp" . emacs-lisp) ("ocaml" . tuareg) ("screen" . shell-script) ("shell" . sh) ("sqlite" . sql) ("toml" . conf-toml)) org-superstar-item-bullet-alist '((42 . 8226) (43 . 10148) (45 . 8226)) ) Thanks for all you do, Thomas