Basically I am trying to spawn a telnet session from a separate thread.

Following Tcl script is executed on a Windows machine.


package require Thread

set threadId [thread::create]

thread::send $threadId {

    package require Expect

    spawn telnet

    expect  {

    "login:"            { send -- "test\n" }


    expect  {

    "Password:"         { send -- "test123\n" }


    send -- "exit\n"

    expect "logout"


thread::release $threadId


I get the error “FlushChannel: damaged channel list” at the end of execution.

The telnet session goes well but at the end of execution I get the above error.

Following packages are used




Is there any solution for this?



Indrojit Paul



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