Hi, Thank you so much for replying. Can you please explain me how you used Perl's Expect ? If you have some sample script, is it possible for you to share that with me @ udk@cisco.com Yes the box which I am trying to talk uses SSHv2 but then only one connection can be opened at a time but from the library implementation I could see multiple channel opens are done, so I assumed that could be the reason why I am getting errored out. If possible share your email id so that I can get the further assistance from you. Thanks In Advance for any kind of help provided.