is this markup no longer applicable?

[Chip]

I am trying to move 'Fine' just a bit to the left and am using this markup -

\once \property Voice.TextScript \override #'extra-offset = #'(2 . -5)

What I want is the 'Fine' over the double bar -

R2*31 \bar "||"
\once \property Voice.TextScript \override #'extra-offset = #'(2 . -5)
R2^"Fine"

but it throughs up an error. Is it no longer supported? (I'm sure I've 
missed the relevant section in the docs, as usual).

Thanks,
Chip