I am trying to figure out how to call a variable variable and I am unable to get it to work.  Let me first explain a little.  I have a script that I want to run the same process on multiple spawn instances without having to define the same process over and over.

So my script is set to spawn a shell prompt and login to several devices.  I then create a variable for each spawn_id and the prompt of the device that I login to.

I would like to do something like the following

set devices "L1 L2 L3"
foreach i $devices {
     spawn $env(SHELL)
     set $i\SHELL $spawn_Id
     expect -re "\((\>|%|#|\\\$) $\)" { set prompt$i $expect_out(1,string) }
}

Then I need to call these again later on so
foreach i $devices {
set spawn_id $$i\Shell

The last line is what I just can't find any examples of how to do.  The variables are set fine up above but I can't call the variable that contains the variable "$$i\Shell" for example.
I am not sure the syntax
I have tried:
$($i\Shell) **which gives me can't read "(L1Shell)": no such variable
$`$i\Shell` **Gives me "can not find channel named $`L1Shell`"
$ ** invalid command name "L1Shell"
${$i\Shell}  ** can't read "$i\Shell": no such variable

Somehow I want to be able to call $L1Shell $L2Shell $L3Shell by by doing
set device "L1 L2 L3"
foreach i $device {
set spawn_id $$iShell ! This syntax for this double variable I cannot figure out.  I lack the experience.
}

Try this

set spawn_id

You know you make it look so easy you make me feel silly.  Thank you so much.  That was spot on.  I have never had any formal programming experience but have been working with expect for about three years.  It is an amazing utility (even though I was getting pretty frustrated last night.)

Thanks again.

I'm glad it worked. I can't take credit for making it look easy though, I just checked in the book for the answer.

I am assuming you are talking about exploring expect.  What page did you find it on.  Because I was looking all over the book last night.

page 51, indirect references

Thanks