From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Charles C. Berry" <ccberry@ucsd.edu>
Subject: Re: [BUG] src code block header does not override buffer-wide header
 in property
Date: Wed, 29 Jun 2016 09:47:22 -0700
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To: Nick Dokos <ndokos@gmail.com>
Cc: emacs-orgmode@gnu.org


Not a bug. See below.

On Wed, 29 Jun 2016, Nick Dokos wrote:

> This was reported on SO:
>
> http://stackoverflow.com/questions/37414837/org-mode-overwriting-globals-properties-in-block-headers
>
> The ECM is as follows:
>
> --8<---------------cut here---------------start------------->8---
> #+PROPERTY: header-args :results silent
>
> #+BEGIN_SRC elisp
> ;; this one is silent
> (setq foo "bar)
> #+END_SRC
>
> #+BEGIN_SRC elisp :results output
> ;; this one is being outputted
> (princ "foo")
> #+END_SRC
> --8<---------------cut here---------------end--------------->8---
>
> The second code block *should* output "foo" as its result, but it does
> not: the :results silent header in the property seems to be in conrol.

Maybe you meant

#+BEGIN_SRC elisp :results output replace :exports both
;; this one is being outputted
(princ "foo")
#+END_SRC


i.e. export code and results and replace the existing result or insert a 
new result.

See (info "(org) results") and scroll down to the 'Handling' paragraph.

Chuck