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I installed "PlantUML Mode for Emacs" using Melpa successfully, and I am able to switch to Plantuml-mode. However, when I try to evaluate code with C-c C-c, inside of org-mode, I get the error:

org-babel-execute-src-block: No org-babel-execute function for plantuml!

How do I add this?

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  • I think that the backend comes with plantuml-mode, do you have it installed?
    – wvxvw
    Nov 7, 2016 at 9:45
  • @wvxvw I believe so, at least I know I can swtich to plantuml-mode
    – David J.
    Nov 7, 2016 at 13:47
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    If you look in your /usr/share/emacs/24.5/lisp/org or equivalent place where you stored your Org mode sources, do you have ob-plantuml.elc, ob-plantuml.el.gz or similar file in there? If so, will adding (require 'ob-plantuml) to your init file (and evaluation) solve the problem?
    – wvxvw
    Nov 7, 2016 at 14:08
  • @wvxvw That fixed it, thanks a lot! (I added the require to my init file)
    – David J.
    Nov 8, 2016 at 14:17
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    Hm... technically, just adding plantuml to org-babel-load-languages should've worked. Wait, did you actually add plantuml to this variable? Something like: (org-babel-do-load-languages 'org-babel-load-languages '((plantuml . t)))
    – wvxvw
    Nov 8, 2016 at 17:42

1 Answer 1

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Wrap the list of languages you want to use with org-babel inside the with-eval-after-load block

(with-eval-after-load 'org
(org-babel-do-load-languages 'org-babel-load-languages '((ruby . t)
(plantuml . t)
)))

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