[O] Wrong captialisation from a latex src block

[Dieter Wilhelm, H.]

Dear (),

when I'm trying to asign a variable in the following way:

     #+BEGIN_SRC latex  :var Idir = (concat  (org-attach-dir) "/PostImage")
       \animategraphics[autoplay,loop,width=10cm]
     {5}{Idir}{716}{728}
     #+END_SRC

I'm getting a wrong capitalisation of Idir:

     #+RESULTS:
     #+BEGIN_LaTeX
     \animategraphics[autoplay,loop,width=10cm]
     {5}{/HOME/Uidg1626/Development/Report/Tz/Haeug0x8g0/PostImage}{716}{728}
     #+END_LaTeX

instead of the following corrected output

#     #+RESULTS:
     #+BEGIN_LaTeX
     \animategraphics[autoplay,loop,width=10cm]
     {5}{/HOME/uidg1626/development/report/tz/haeug0x8g0/PostImage}{716}{728}
     #+END_LaTeX

Am I doing something wrong?

Thanks
   Dieter
--
Best wishes

    H. Dieter Wilhelm

Darmstadt
Germany