Hi @dhouha.cherif ,
If you are using an RE-Framework, you could try writing the Datatable to an Excel File in the End State using Write Range Activity as you are already adding using Add Data Row Activity to add the values to the Datatable.
We normally write the Reporting values at the End after all the Execution for the transaction items is completed.
Making sure, the Datatable reporting variable is In/Out Direction is necessary when passing between workflows so that we have the updated Datatable value.