[ns] prune problem

[revia.bbs@bbs.et.ntust.edu.tw]

Hello all,I got a prune problem below

ns: _o89 recv prune 4 0: no reachable alloc
    (Class create line 1)
    invoked from within
"Timer/Iface/Prune create _o98 _o88 0 -2147483646 _o77 _o4"
    invoked from within
"catch "$className create $o $args" msg"
    (procedure "new" line 3)
    invoked from within
"new Timer/Iface/Prune $self $src $group $tmpoif $ns_"
    (procedure "_o88" line 20)
    (DM recv-prune line 20)
    invoked from within
"_o88 recv-prune 2 0 -2147483646 4"
    ("eval" body line 1)
    invoked from within
"eval $proto_ recv-$type $from $src $group $iface $args"
    (procedure "_o89" line 3)
    (Agent/Mcast/Control recv2 line 3)
    invoked from within
"_o89 recv2 prune 4 2 0 -2147483646"
    ("eval" body line 1)
    invoked from within
"eval $self recv2 $type $iface $messages($m)"
    (procedure "_o89" line 3)
    (Agent/Mcast/Control recv line 3)
    invoked from within
"_o89 recv prune 4 0"

the routing protocol is DM
_o89 is a sender
I have three node,topology is like below

      s(id 0)------c1(id 1)
          |
          |--------c2(id 2)
c1 join-group to s,but c2 not.
so,c2 should has prune message to s.
but s can't do prune.
how do I solve the problem?
thanks a lot.
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