Use the Flush Buffer option to write out the buffered rows to the
target.
All components for which a write block size has been specified
can buffer data until the write block size is reached. At any time
during simulation, if there is data in the buffer, the Flush Buffer
option appears, along with the number of rows. If the buffer is
empty, the option is not available.
Right-click the Text Data Sink component and
select Flush Buffer.