Answer / rashmi

1. Create one data item nmaed 'Blank' insert some empty space within single quotes ' '
2. Unlock list and add this 'Blank' data iten under the Data item which is alraedy inserted
3. Create Boolean variable mod(RowNumber(),3)=0
4. Assign above Boolean variable as render variable to above 'Blank' data item
5. Run the report, you will get to see blank space after every 3rd row

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