You cannot set the GroupInterval property to 0 when the GroupOn property is set to Interval.@Click the Sorting and Grouping ...

You cannot set the GroupInterval property to 0 when the GroupOn property is set to Interval.@Click the Sorting and Grouping Design tab and try one of the following:
* Change the GroupInterval property setting to a number higher than 0.
* Change the GroupOn property setting to Each Value.@@1@@@1