report based on flat file

I have created an infoset fof R/3 ods and flat file ods.

In my R/3 ODS, we have bill date and in flat file ods we have 0datefrom (valid from) and 0dateto (valid to) date.

We have linked the 0datefrom to 0calday . We have the bill date to 0billdate r/3 ods.

We want the report to be executed based on 0datefrom using single value variable and 0dateto using single value variable.

Now we are able to execute the report for only for 0datefrom (using ranges). How to