Cant make make-lan work

[Mike Frumin <mfrumin@nepal.stanford.edu>]

Hi. I've seen this problem posted before, but never the solution.
when using the standard call to make-lan as provided in the ns users
manual (i.e. $ns make-lan "$node1 $node 2" 100 Mb 1ms LL Queue/DropTail
Mac/Csma/Cd) I get ugly errors.  It gives an error with the final
Mac/Csma/Cd command. silly. and if I take out the list of nodes (i.e. put
in the empty string) I get other nonsense errors.
any thought? I'm using 2.1b5

thanks a lot,
Mike