Reply To: Script to convert all text variables

I'm trying to do something similar in Applescript, for much the same reason. But

tell (every text variable instance) to convert to text

doesn't seem to work. I get the following:

error “Adobe InDesign CS5 got an error: every text variable instance of active document doesn’t understand the convert to text message.” number -1708 from every text variable instance of active document

Yet the dictionary seems to indicate that this ought to work:

convert to text specifier : Supported by the following objects: note, footnote, text variable, text variable instance.

Any ideas?