Hi,
You could try this solution.
In your IMAP, create 2 new data items based on your "date" field.
1st. Min. Date: type measure; agregation Minimum; format date
2nd. Max Date: type measure; agregation Maximum; format date
Then in WRS, when you create your report, you select the new items.
You insert a TEXT object in which you can insert dynamic values (measure or prompt values). There, you can write: From [Minimum date] to [Maximum Value].
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