$ ./sguil.tk
ERROR: The tcllib_dns package version 1.3.1 or higher is requred.
The tcllib_dns package is part of the tcllib extension. More information
is available at http://tcllib.sourceforge.net
can't find package dns 1.3.1
Error in startup script: invalid command name "CleanExit"
while executing
"CleanExit"
invoked from within
"if [catch {package require dns 1.3.1} dnsVersion] {
puts "ERROR: The tcllib_dns package version 1.3.1 or higher is requred."
puts "The tcllib_..."
(file "./sguil.tk" line 46)