All things related to multicast

[Bill Owens <>]

Within the last couple of hours my local copy of nsdr began crashing 
with the following error:

adelie {owens}% nsdr
mash: _o19 recv_announcement 129.170.19.21 32768 { 
u=www.dartmouth.edu
            t=3247691400 3250117800
            a=type:test
            m=audio 1234 udp 14
            c=IN IP4 233.42.3.100/15
            xxxxxxxxxxxxxxxxxxxxx
 } 204: can't read "msg": no such variable
    while executing
"$msg set uri_ $value"
    ("u" arm line 2)
    invoked from within
"switch $tag {
                v {
                        set media ""
                        set msg [new SDPMessage]
                        lappend allmsgs $msg
                        $msg set version_ $value
                }
                o {
                        if {![info exists msg..."
    (procedure "_o18" line 25)
    (SDPParser parse line 25)
    invoked from within
"$sdp_ parse $data"
    (procedure "_o16" line 4)
    (ProgramSource process line 4)
    invoked from within
"$self process [string trim $data]"
    (procedure "_o16" line 2)
    (Object next line 2)
    invoked from within
"$self next $data"
    (procedure "_o16" line 4)
    (ProgramSource/SAP recv line 4)
    invoked from within
"_o16 recv _o19 129.170.19.21 32768 {           u=www.dartmouth.edu
            t=3247691400 3250117800
            a=type:test
            m=audi..."
    ("eval" body line 1)
    invoked from within
"eval $s_ recv $self $args"
    (procedure "_o19" line 3)
    (AnnounceListenManager/SAP/Nsdr recv_announcement line 3)
    invoked from within
"_o19 recv_announcement 129.170.19.21 32768 {           u=www.dartmouth.edu
            t=3247691400 3250117800
            a=type:test
          ..."

It looks like there's an announcement coming from Dartmouth that is 
giving nsdr fits. My guess is that it isn't syntactically correct, 
because my other SDP-aware apps are not showing it (MacTV, old-style 
sdr, Juniper session monitor). Is anyone else seeing the same thing?

Bill.