[vtkusers] vtkOBJExporter, vtkVRMLExporter and vtkPolyDataWriter problem

[R M]

Hi,

I use vtk 5.8 with Linux Centos 6. 
My problem is when I use vtkOBJExporter, vtkVRMLExporter and vtkPolyDataWriter, files are created but I can't open them anymore.
It seems that I have a probem with the format.  I have ","  instead of "." as numbers separators.
So, I have change the locals of my system.  It only works for the vtk output but I have still problems with obj and wrl that I have exported. 
I have this message: 

I can't open them anymore with my application. I have a reading error (Error reading ascii data. Possible mismatch of datasize with declaration.)

Any idea in order to save and open them correctly ?

Thanks !
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