Set Analysis: Date Comparison and variable reference

[#1]

Hi all,

can someone help me with the current set analysis expression:

count( { < (=date#(Delibera.DataDeliberaAzienda, 'DD/MM/YYYY')) = {" >= '$(DataInizio)' < '$(DataFine)' "}>} IdAzienda)

DataInizio and DataFine are two document variables.

I have some problems with date comparison, or with variable reference : it don't works....

Thanks in advance!