I have found a solution, but this is a work arround solution. What I did, I have put an extra question in my question answer file which question never appears in the installation. So expect waiting for the last question and send the output of previous question (which is desiable to me). But I am not happy with this solution. Is this a bug of expect module? I have also encountered the same problem when I have used tcl-expect.
Any explation why this is happening?
Thanks
-Pijush