odt export and embedded latex

[Esteban Venialgo]

hi org experts,

I'd like to export a .org file as ODT and I have an embedded latex gantt 
chart in a separated tex file. The problem is that the gantt chart does 
not get exported. It seems that it's completely ignored by the odt 
exporting tool.
This is the latex section within my .org file:

------------------------------------------------------------------------------------------------
* Planning

  Gantt chart with the project planning:
  #+LaTeX_HEADER: \input{./project_planning/gantt_preamble.tex}
  #+INCLUDE: "./project_planning/gantt.tex" export latex
------------------------------------------------------------------------------------------------

If I export the .org with org-latex-export-to-pdf, it works with no 
errors. So, it's not an issue related to the latex source itself.
May you have any suggestions to try ?

    Thanks for your help, Esteban