You were right.
If I do M-x org-version it says:
Org-mode version 8.3beta (release_8.3beta-1062-gce4e64-git @ mixed
installation! /usr/share/emacs/24.5/lisp/org/ and
/home/damian/git/org-mode/lisp/)

I've downloaded org from git and loaded it with:
(add-to-list 'load-path "~/git/org-mode/lisp")
(add-to-list 'load-path "~/git/org-mode/contrib/lisp")

How can I tell emacs to not load the /usr/share/emacs/24.5/lisp/org package?

2015-04-25 17:35 GMT+00:00 Eric S Fraga <e.fraga@ucl.ac.uk>:

> On Saturday, 25 Apr 2015 at 15:47, Damian Bernardini wrote:
> > I'm trying to use ledger blocks inside org with babel:
>
> [...]
>
> > I'm trying the noweb example from:
> > http://orgmode.org/worg/org-contrib/babel/languages/ob-doc-ledger.html
> >
> > I can evaluate and get results from income and expenses blocks, but when
> I
> > try to run C-c C-c on balance block I get:
> > Symbol's function definition is void: org-id-find-id-file
>
> What version of org are you using?  How are you loading org?
>
> The error message you get is rather suspicious and makes me think you
> might have an installation of org that is possibly a mix of old and new.
> That function is in org-id.el which is required by org-attach which
> itself is required by org...
>
> What is the output of M-x find-library RET org RET?
>
> Finally, maybe prepare a minimal example and post it to this list.  I
> use ledger in org all the time and it works fine.
> --
> : Eric S Fraga (0xFFFCF67D), Emacs 25.0.50.1, Org
> release_8.3beta-1062-gce4e64
>