org-babel-load-languages has issues in v104.2

[liangwang]

To enable python code evaluation in org-mode, the org-babel document suggests the following:

     (org-babel-do-load-languages
      'org-babel-load-languages
      '((python . t)))

Prior v104.x, it works by putting the above code in dotspacemacs/config. After upgrade to v104.2, if the above code is put in dotspacemacs/user-config, emacs throws the following error at startup:

Invalid function: org-babel-header-args-safe-fn

When move the code into dotspacemacs/user-init, emacs starts without any error messages. But autofill within org file does not work. Emacs will show the error message as follows:

An element cannot be parsed line xxx

BTW, is dotspacemacs/user-config and/or dotspacemacs/user-init the right place to put org-mode related customizations?

[TheBB]

I'm not sure why it doesn't work, but certainly it has to go in user-config. Otherwise org will not yet have been configured by Spacemacs.

Can I ask for your SPC hds output?

[TheBB]

https://lists.gnu.org/archive/html/emacs-orgmode/2015-08/msg00254.html

Might be an error in org-plus-contrib. Try updating it and see if it works for you. It does for me...

[liangwang]

It is related to the old "org" package installed by spacemacs v103: after upgrade to v104, the "org" package is not deleted automatically, and messes up with new org-plus-contrib package. It works for me right now after manually delete the old "org".

Besides, I would really appreciate if the document (either spacemacs or org layer) can provides some examples/tutorials on how to wrap customized org settings into a personal private layer. Putting everything within user-config seems a little messy to me.

[TheBB]

Thanks! You can read doc/LAYERS.org for some info about how to write layers. It doesn't cover org specifically, but it might still help you. I think #3277 should cover the org specific documentation problems. I'm closing this, then.

[liangwang]

Update on this issue:

I could reproduce the issue with the following steps:

1. Make a fresh spacemacs install using git clone https://github.com/syl20bnr/spacemacs ~/.emacs.d

2. Make sure the spacemacs configuration enables the org layer. and has the following settings in spacemacs/user-config

    (org-babel-do-load-languages
     'org-babel-load-languages
     '((R . t)
       (python . t)))

3. Launch emacs. After spacemacs installs all packages, exit spacemacs. Then you can find both org and org-plus-contrib under ~/.emacs.d/elpa

4. Launch emacs again, you will see Invalid function: org-babel-header-args-safe-fn at the bottom shortly after it says spacemacs is ready.

The following workaround works for me:

1. Delete org and org-plus-contrib under ~/.emacs.d/elpa
2. Launch emacs again, and this time, spacemacs will only install org-plus-contrib. Then exit emacs
3. Launch emacs, no org-babel-header-args-safe-fn error anymore.

[tommyjiang]

Thanks @liangwang for providing this solution to solve this problem.

[markhuyong]

if you have ob-R in your config, then remove it.ob-R

[devminz]

for my case ( emacs newbie < 1m ) I faced same issue for elixir layer.
Got it resolved just by removing all *.elc files in .emacs and restarting emacs.

[biocyberman]

This single error has caused me quite a headache. I finally found a specific solution for my case (because org is not installed, and org-plus-contrib has been installed correctly). Thanks to this blog post:
https://sort-care.github.io/Emacs-Invalid-function-org-babel-header-args-safe-fn/
In essence, the evil line was:

      (org-babel-do-load-languages
      'org-babel-load-languages
      '(
        (python . t)
        (R . t) ; this one is causing problem.
       )
       )

The solution is to run SPC SPC byte-compile-file ./elpa/org-plus-contrib-20180625/ob-R.el. You have to run this, even though you might see the .elc file there already.

[QikeLi]

The solution from @ biocyberman solved my problem.

[penn201500]

https://emacs.stackexchange.com/questions/32001/org-babel-9-spacemacs-unable-to-evaluate-org-babel-src-blocks