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"
 )