Rasmus <rasmus@gmx.us> writes:

> Rainer M Krug <Rainer@krugs.de> writes:
>
>> #+PROPERTY: header-args  :tangle-mode (identity #o444)
>>
>> * Initial plottings
>> #+begin_src R
>> plot(1)
>> #+end_src
>>
>> When calling org-babel-view-src-block-info (C-c C-v C-i) on the code
>> block above, I get the error below.
>>
>> I don't have the slightest clue what this means or how it can be fixed,
>> but it caused by the call to (identity #o444).
>
> Is #o444 significant to you?

Well - it is more or less straight out of the org manual:

,----
| 14.8.2.24 `:tangle-mode'
| ........................
| 
| The `tangle-mode' header argument controls the permission set on tangled
| files.  The value of this header argument will be passed to
| `set-file-modes'.  For example, to set a tangled file as read only use
| `:tangle-mode (identity #o444)', or to set a tangled file as executable
| use `:tangle-mode (identity #o755)'.  Blocks with `shebang' (*Note
| shebang::) header arguments will automatically be made executable unless
| the `tangle-mode' header argument is also used.  The behavior is
| undefined if multiple code blocks with different values for the
| `tangle-mode' header argument are tangled to the same file.
| 
`----

I don't know if I could use anything else. 

>
> I guess you could use, or maybe a lambda that combines #o444 whatever it
> means with your src.  I have no clue what #o444 means or :tangle-mode and
> I never heard of org-babel-view-src-block-info so take it with a grain of
> salt.

org-babel-view-src-block-info : Bound to C-c C-v C-i by default (?).

,----
| Display information on the current source block.
| This includes header arguments, language and name, and is largely
| a window into the `org-babel-get-src-block-info' function.
`----

Very useful as I have found out recently.

>
> #+PROPERTY: header-args  :tangle-mode (lambda (src) (identity src))
>
> * Initial plottings
> #+begin_src R
>   plot(1)
> #+end_src
>
> Or
>
> #+PROPERTY: header-args  :tangle-mode identity src
>
> * Initial plottings
> #+begin_src R
>   plot(1)
> #+end_src

-- 
Rainer M. Krug
email: Rainer<at>krugs<dot>de
PGP: 0x0F52F982