[ns] HELP in running mcast

[Krishna Mohan Doddappaneni <dkm@ee.tamu.edu>]

HI ,
Iam running the mcast example given in the example directory.
Iam getting these errors

ns: _o3 run-mcast: invalid command name "0"
    while executing
"[$link set ifacein_] set intf_label_"
    (procedure "_o10" line 3)
    (Node get-oif line 3)
    invoked from within
"$self get-oif $link"
    (procedure "_o10" line 5)
    (Node init-outLink line 5)
    invoked from within
"$node init-outLink"
    (procedure "_o3" line 5)
    (Simulator run-mcast line 5)
    invoked from within
"_o3 run-mcast"


Can anyone help me in solving this error?
Thanks,
Krishna