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The command line interpreter allows you to type any TCL command at the
console, rather like the wish tool from Tk. Unlike wish though, the
GNU readline library is employed, so expect the usual command and
history editing functionality you expect from bash. It is simply
invoked by the TCL command cli.
If the readline library is not available, then cli will not
provide command line editing. However, you can still supply a script
to Eco Lab's standard input.
TCL is not a thread aware system (since it runs on Windows and MacOS), so when the command line interpreter is running, nothing else is -- eg GUI widgets or the model. This restriction may be lifted in the future on Posix compliant systems.