Hi @sankar.mayilsamy ,
Please follow the below steps to achieve your requirement.
- Use work book read range and in the range just keep “” so that it will capture the entire data into the data table(DT).

- Use Assign activity and calculate the dynamic row count like below and assing to one integer variable.
RowCount = DT.rows.Count

- use the above dynamic row count in the another read range this time we put the following statement “A1:H”+RowCount.tostring in the range so that it will get only the content available in the A to H dynamically irrespective of how many rows we have.

let us know if you face any issues after following the above steps. thanks.
Regards,
Kirankumar.