Loop in Except Script Variable Getting Value from Text File - expect

Question

I have the following script:
#!/usr/bin/expect -f
# Set variables
set hostname [lindex $argv 0]
set username [lindex $argv 3]
set password [lindex $argv 1]
set devname [lindex $argv 4]
set enablepassword [lindex $argv 2]
set conft 0
# Log results
log_file -a ~/scripts/ExpectScripts/9120CiscoAPs/results.log
# Announce which device we are working on and at what time
send_user "\n"
send_user ">>>>> Working on $hostname $devname # [exec date] <<<<<\n"
send_user "\n"
# Don't check keys
set timeout 30
spawn ssh -o StrictHostKeyChecking=no -o ConnectTimeout=30 $username\#$hostname
expect "User:"
send "$username\n"
expect "Password:"
send "$password\n"
expect "*>"
set f [open "aprebootlist2.txt"]
set aps [split [read $f] "\n"]
close $f
foreach ap $aps {
send "config ap reset $ap\n"
expect {
"*n)" {send "y\n"}
"*invalid." {send "\r"}
}
expect eof
close
}
send "\r"
expect "*>"
send "logout\n"
expect "*(y/N)"
send "n\r"
exit
This should log into a cisco wireless controller and basically run the command "ap config reset apvariable" a bunch of times. I tried to create a loop getting the variable for ap name from a text file. The script logs into the controller, reads the first name in the file, than fails with the below error. What am I doing wrong?
Error is:
Cisco Controller) >send: spawn id exp6 not open
while executing
"send "config ap reset $ap\n""
("foreach" body line 2)
invoked from within
"foreach ap $aps {
send "config ap reset $ap\n"
expect {
"*n)" {send "y\n"}
"*invalid." {send "\r"}
}
expect eof
..."
(file "./rebootapcommands2.exp" line 29)