Hello, I don't know what caused the following message when I opened an org file, but I'm reporting it as requested by the message: Warning (org-element-cache): org-element--cache: Org parser error in tmp_train_notes.org::1. Resetting. The error was: (wrong-type-argument listp 4240) Backtrace: nil Please report this to Org mode mailing list (M-x org-submit-bug-report). Disable showing Disable logging When I opened the same file a second time there was no error message. Paul Emacs : GNU Emacs 28.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.37, cairo version 1.16.0) of 2023-03-16, modified by Debian Package: Org mode version 9.7-pre (release_9.6.8-749-g4fe52f @ ~/.emacs.d/org-mode-git/lisp/) current state: ============== (setq org-link-elisp-confirm-function 'yes-or-no-p org-bibtex-headline-format-function 'org-bibtex-headline-format-default org-log-done 'time org-fontify-done-headline nil org-log-into-drawer t org-startup-folded t org-persist-after-read-hook '(org-element--cache-persist-after-read) org-format-latex-options '(:foreground "Yellow" :background default :scale 1.2 :html-foreground "Black" :html-background "Transparent" :html-scale 1.07 :matchers ("begin" "$1" "$" "$$" "\\(" "\\[")) 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-archive-hook '(org-attach-archive-delete-maybe) org-file-apps '((auto-mode . emacs) ("\\.odt\\'" . "libreoffice %s") ("\\.docx\\'" . "libreoffice %s") ("\\.xlsx\\'" . "libreoffice %s") ("\\.png\\'" . "xv %s") ("\\.jpg\\'" . "xv %s") ("\\.jpeg\\'" . "xv %s") ("\\.webp\\'" . "xv %s") ("\\.pdf\\'" . "okular \"%s\"") ("\\.xoj" . "xournal %s") ("\\.xopp" . "xournalpp %s")) 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-cycle-display-inline-images) org-persist-before-read-hook '(org-element--cache-persist-before-read) org-mode-hook '(#[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) org-babel-load-languages '((R . t) (emacs-lisp . t) (gnuplot . t) (octave . t) (python . t) (fortran . t) (sql . t) (ditaa . t) (dot . t) (shell . t)) 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-adapt-indentation t org-html-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"] outline-isearch-open-invisible-function 'outline-isearch-open-invisible org-highlight-latex-and-related '(latex) org-odt-format-headline-function 'org-odt-format-headline-default-function org-agenda-before-write-hook '(org-agenda-add-entry-text) org-src-preserve-indentation t org-babel-tangle-lang-exts '(("fortran" . "F90") ("python" . "py") ("emacs-lisp" . "el") ("elisp" . "el")) org-src-mode-hook '(org-src-babel-configure-edit-buffer org-src-mode-configure-edit-buffer) org-confirm-elisp-link-function 'yes-or-no-p org-clock-out-remove-zero-time-clocks t org-hide-leading-stars t org-todo-keywords '((sequence "TODO(t!)" "MAYBE(m!)" "STARTED(s!)" "WAITING(w@/!)" "|" "DONE(d)" "INFO(i!)" "CANCELLED(c@)" "UNFINISHED(u@)" "ABANDONED(a@)") ) org-id-link-to-org-use-id t 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-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default org-odt-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"] org-confirm-babel-evaluate nil org-fold-core-isearch-open-function 'org-fold-core--isearch-reveal org-clock-in-switch-to-state "STARTED" org-clock-persist 'history 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-clock-display-default-range 'untilnow org-agenda-loop-over-headlines-in-active-region nil org-todo-keyword-faces '(("TODO" :foreground "light pink" :weight bold) ("MAYBE" :foreground "light pink" :weight bold) ("STARTED" :foreground "gold" :weight bold) ("DONE" :foreground "light green" :weight bold) ("WAITING" :foreground "gold" :weight bold) ("CANCELLED" :foreground "light green" :weight bold) ("UNFINISHED" :foreground "light green" :weight bold) ("ABANDONED" :foreground "light green" :weight bold)) org-occur-hook '(org-first-headline-recenter) org-export-with-drawers '("LATEX_DRAW") org-metadown-hook '(org-babel-pop-to-session-maybe) org-link-parameters '(("attachment" :follow org-attach-follow :complete org-attach-complete-link) ("eww" :follow org-eww-open :store org-eww-store-link) ("rmail" :follow org-rmail-open :store org-rmail-store-link) ("mhe" :follow org-mhe-open :store org-mhe-store-link) ("irc" :follow org-irc-visit :store org-irc-store-link :export org-irc-export) ("info" :follow org-info-open :export org-info-export :store org-info-store-link :insert-description org-info-description-as-command) ("gnus" :follow org-gnus-open :store org-gnus-store-link) ("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) ("w3m" :store org-w3m-store-link) ("doi" :follow org-link-doi-open :export org-link-doi-export) ("id" :follow org-id-open) ("file+sys") ("file+emacs") ("shell" :follow org-link--open-shell) ("news" :follow #[514 "\301\300\302 Q \"\207" ["news" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("mailto" :follow #[514 "\301\300\302 Q \"\207" ["mailto" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("https" :follow #[514 "\301\300\302 Q \"\207" ["https" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("http" :follow #[514 "\301\300\302 Q \"\207" ["http" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("ftp" :follow #[514 "\301\300\302 Q \"\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-clock-history-length 28 org-clock-into-drawer "CLOCK" )