Tablatures doesn't work

[Lamy Jean-Baptiste]

Hi,

I am back to Lilypond, but tablatures no longer work in the CVS
(yesterday's CVS).
When i run Lilypond on the example tablature
(./lilypond/input/test/tablature.ly) i get the following error:

        warning: can't find or create `TabStaff' called `'

though the TabStaff context IS referrenced in engraver-init.ly...

Does someone have an idea ?

Jiba