When does a grob gets its paper-column?

[Urs Liska]

Hi,

in an engraver I have a reference to the current grob.

It seems that while in the acknowledgers routing this grob doesn't have 
a paper column set while in the finalze routine it has.

Is that correct, and I have to wait until the finalize stage until I can 
retrieve the rhythmic location of a grob?

TIA
Urs