Hi there,

First, thanks for maintaining this awesome tool.

In "ob-octave.el" line 94, instead of

(format "print -dpng %S\nans=%S" gfx-file gfx-file))

should be

(format "print -dpng %s" gfx-file))

otherwise, the figure is not saved (and thus an empty inline figure will
appear).

I already test it with MATLAB and can confirm it.

By the way, it is my first bug report/fix for org-mode, so apologies if
I miss something in my report.

Best wishes,
Shervin

Emacs  : GNU Emacs 29.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.33, cairo version 1.16.0)
 of 2023-08-16
Package: Org mode version 9.7-pre (release_9.6.7-662-gb89bc5 @
/home/ssafavi/.ssemacs.d/classicemacs/straight/build/org/)

current state:
==============
(setq
 org-archive-location "archive/%s_archive::"
 org-noter--doc-goto-location-hook '(org-noter-djvu--goto-location
    org-noter-nov--goto-location
    org-noter-pdf--goto-location)
 org-link-elisp-confirm-function nil
 org-ref-cite-onclick-function '(closure (t) (_)
(org-ref-citation-hydra/body))
 org-bibtex-headline-format-function 'org-bibtex-headline-format-default
 org-export-with-sub-superscripts '{}
 org-ref-insert-cite-function 'org-ref-cite-insert-ivy
 org-log-done 'time

 org-babel-after-execute-hook '(scimax-align-result-table
org-display-inline-images
scimax-rm-backslashes scimax-jupyter-ansi)
 org-agenda-skip-scheduled-if-done t
 org-persist-after-read-hook '(org-element--cache-persist-after-read)
 org-ctrl-c-ctrl-c-hook '(scimax-org-image-toggle-image-CcCc
scimax-radio-CcCc)
 org-link-make-description-function '(lambda (link desc)
     (plist-get org-store-link-plist :description))
 org-ref-open-pdf-function 'my/org-ref-open-pdf-at-point
 org-export-before-parsing-hook '(org-attach-expand-links
 org-babel-jupyter-strip-ansi-escapes)
 org-cycle-tab-first-hook '(org-babel-hide-result-toggle-maybe
org-babel-header-arg-expand)
 org-latex-title-command ""
 org-ref-bibtex-assoc-pdf-with-entry-move-function 'rename-file
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-speed-commands '(("Outline Navigation")
     ("n" org-speed-move-safe 'org-next-visible-heading)
     ("p" org-speed-move-safe 'org-previous-visible-heading)
     ("f" org-speed-move-safe 'org-forward-heading-same-level)
     ("b" org-speed-move-safe 'org-backward-heading-same-level)
     ("F" . org-next-block) ("B" . org-previous-block)
     ("u" org-speed-move-safe 'outline-up-heading) ("j" . org-goto)
     ("g" org-refile '(4)) ("Outline Visibility") ("c" . org-cycle)
     ("C" . org-shifttab) (" " . org-display-outline-path)
     ("s" . org-toggle-narrow-to-subtree) ("k" . org-cut-subtree)
     ("=" . org-columns) ("Outline Structure Editing") ("U" . org-metaup)
     ("D" . org-metadown) ("r" . org-metaright) ("l" . org-metaleft)
     ("R" . org-shiftmetaright) ("L" . org-shiftmetaleft)
     ("i" progn (forward-char 1)
      (call-interactively 'org-insert-heading-respect-content))
     ("^" . org-sort) ("w" . org-refile)
     ("a" . org-archive-subtree-default-with-confirmation)
     ("@" . org-mark-subtree) ("#" . org-toggle-comment)
     ("Clock Commands") ("I" . org-clock-in) ("O" . org-clock-out)
     ("Meta Data Editing") ("t" . org-todo) ("," org-priority)
     ("0" org-priority 32) ("1" org-priority 65) ("2" org-priority 66)
     ("3" org-priority 67) (":" . org-set-tags-command)
     ("e" . org-set-effort) ("E" . org-inc-effort)
     ("W" lambda (m) (interactive "sMinutes before warning: ")
      (org-entry-put (point) "APPT_WARNTIME" m))
     ("Agenda Views etc") ("v" . org-agenda) ("/" . org-sparse-tree)
     ("Misc") ("o" . org-open-at-point) ("?" . org-speed-command-help)
     ("<" org-agenda-set-restriction-lock 'subtree)
     (">" org-agenda-remove-restriction-lock) ("P" . org-set-property)
     ("d" . org-deadline) ("m" . org-mark-subtree) ("S" . widen)
     ("k" . scimax-org-kill-subtree) ("q" . scimax-avy-org-headline)
     ("T" . org-teleport))
 org-noter--pretty-print-location-for-title-hook
'(org-noter-djvu--pretty-print-location
  org-noter-nov--pretty-print-location
  org-noter-pdf--pretty-print-location-for-title)