[TYPO3-templavoila] How to fill special.value with value from TemplaVoila?

[Peter Kraume]

Hi,

I want to create a menu with special = directory where the UID where to 
start should be filled dynamically from a TemplaVoila field.

This doesn't work:
special = directory
special.value.data = field_lpmetanavstart

Any ideas, what to change?

Thx
Peter