Difficulties updating a file directory

Hi,

I'm having problems understanding how #chooseDirectory: works. When I
run this code:

GrafoscopioDocumentation current localPlace: (UIManager default
chooseDirectory: 'Path to the documents Folder')

from a playground and choose a folder in my home directory, results in
localPlace containing a FileReference to
'/home/offray/Documents/Grafoscopio', which is what I expect. But if I
put a similar code here:

"""

GrafoscopioDocumentation >> updateDocsPlace

     self current localPlace: (UIManager default chooseDirectory: 'Path
to the documentation folder')

"""

and choose the same folder, I got a relative FileReference to
'Grafoscopio', instead of the one to the full path, that doesn't point
to anything existing in my system.

What I'm missing here?

Thanks,

Offray