I create a process that writes the data come from the database in a file format txt
My loop is correct when I look at my file after execution it is empty
My content is Process.BD.QueryResults.ResultSets.Rows[Process.Boucle_1.CurrentLoopIteration].id
First Process.BD.QueryResults.length is greater than zero?
Also, are you writing into the txt file on every iteration of the loop? Check if the attribute Append (if file exists) is checked.