Hi everybody.
First thanks to all the developers for making such a wonderful work with 
sofia-sip! 

back to the point, I'm  having some problems when trying to answer a call 
through wengo. I get a "strange ACK" message when accepting the invite, and 
then a terminated message with an internal error before that. 

However, it's fine if I am the one calling from sofia-sip to another client 
through wengo. Any idea? 

Here I strip a little from the output with TPORT_LOG=9 

  ------------------------------------------------------------------------
Remote SDP: (null)
Call 6|early
recv 1118 bytes from udp/[213.91.9.206]:5060 at 15:18:50.843667:
  ------------------------------------------------------------------------
  INVITE sip:[EMAIL PROTECTED] SIP/2.0
  Record-Route: <sip:213.91.9.206:5060;lr=on>
  Record-Route: 
<sip:192.168.70.88:5062;proxy=yes;ftag=32721-BF-00a49812-47837c974;lr=on>
  Record-Route: <sip:192.168.70.242:5067;lr=on>
  Allow: UPDATE,REFER
  Call-ID: [EMAIL PROTECTED]
  Contact: <sip:213.91.9.213:5060>
  Content-Type: application/sdp
  CSeq: 10745350 INVITE
  From: "cjb2002" 
<sip:[EMAIL PROTECTED];user=phone>;tag=32721-BF-00a49812-47837c974
  Max-Forwards: 27
  To: <sip:[EMAIL PROTECTED];user=phone>
  User-Agent: Cirpack/v4.41a (gw_sip)
  Via: SIP/2.0/UDP 213.91.9.206;branch=0
  Via: SIP/2.0/UDP 192.168.70.88:5062;branch=z9hG4bK261e.c5161123.0
  Via: SIP/2.0/UDP 192.168.70.242:5067;branch=0
  Via: SIP/2.0/UDP 
213.91.9.213:5060;received=192.168.70.20;branch=z9hG4bK-14AE-27B95
  Content-Length: 276 

  v=0
  o=cp10 119927620337 119927620338 IN IP4 80.118.99.22
  s=SIP Call
  c=IN IP4 80.118.99.22
  t=0 0
  m=audio 45168 RTP/AVP 8 0 18
  b=AS:64
  a=rtpmap:8 PCMA/8000/1
  a=rtpmap:0 PCMU/8000/1
  a=rtpmap:18 G729/8000/1
  a=fmtp:18 annexb=no
  a=ptime:30
  a=sendrecv
  a=nortpproxy:yes
  ------------------------------------------------------------------------
send 733 bytes to udp/[213.91.9.206]:5060 at 15:18:50.844278:
  ------------------------------------------------------------------------
  SIP/2.0 500 Overlapping Requests
  Via: SIP/2.0/UDP 213.91.9.206;branch=0
  Via: SIP/2.0/UDP 192.168.70.88:5062;branch=z9hG4bK261e.c5161123.0
  Via: SIP/2.0/UDP 192.168.70.242:5067;branch=0
  Via: SIP/2.0/UDP 
213.91.9.213:5060;received=192.168.70.20;branch=z9hG4bK-14AE-27B95
  From: "cjb2002" 
<sip:[EMAIL PROTECTED];user=phone>;tag=32721-BF-00a49812-47837c974
  To: <sip:[EMAIL PROTECTED];user=phone>;tag=F19jtD1g3Hmpp
  Call-ID: [EMAIL PROTECTED]
  CSeq: 10745350 INVITE
  Retry-After: 7 (Overlapping Requests)
  User-Agent: sofia-sip/1.12.7
  Accept: application/sdp
  Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, 
NOTIFY, REFER, UPDATE
  Supported: timer, 100rel
  Content-Length: 0 

  ------------------------------------------------------------------------
recv 509 bytes from udp/[213.91.9.206]:5060 at 15:18:51.066475:
  ------------------------------------------------------------------------
  ACK sip:[EMAIL PROTECTED] SIP/2.0
  Max-Forwards: 10
  Record-Route: <sip:213.91.9.206:5060;lr=on>
  Via: SIP/2.0/UDP 213.91.9.206;branch=0
  Via: SIP/2.0/UDP 192.168.70.88:5062;branch=z9hG4bK261e.c5161123.0
  From: "cjb2002" 
<sip:[EMAIL PROTECTED];user=phone>;tag=32721-BF-00a49812-47837c974
  Call-ID: [EMAIL PROTECTED]
  To: <sip:[EMAIL PROTECTED];user=phone>;tag=F19jtD1g3Hmpp
  CSeq: 10745350 ACK
  User-Agent: OpenSer (1.1.0-notls (i386/linux))
  Content-Length: 0 

  ------------------------------------------------------------------------
nua(0x8059e88): strange ACK from <sip:[EMAIL PROTECTED];user=phone>
send 733 bytes to udp/[213.91.9.206]:5060 at 15:18:51.345997:
  ------------------------------------------------------------------------
  SIP/2.0 500 Overlapping Requests
  Via: SIP/2.0/UDP 213.91.9.206;branch=0
  Via: SIP/2.0/UDP 192.168.70.88:5062;branch=z9hG4bK261e.c5161123.0
  Via: SIP/2.0/UDP 192.168.70.242:5067;branch=0
  Via: SIP/2.0/UDP 
213.91.9.213:5060;received=192.168.70.20;branch=z9hG4bK-14AE-27B95
  From: "cjb2002" 
<sip:[EMAIL PROTECTED];user=phone>;tag=32721-BF-00a49812-47837c974
  To: <sip:[EMAIL PROTECTED];user=phone>;tag=F19jtD1g3Hmpp
  Call-ID: [EMAIL PROTECTED]
  CSeq: 10745350 INVITE
  Retry-After: 7 (Overlapping Requests)
  User-Agent: sofia-sip/1.12.7
  Accept: application/sdp
  Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, 
NOTIFY, REFER, UPDATE
  Supported: timer, 100rel
  Content-Length: 0 

  ------------------------------------------------------------------------
recv 509 bytes from udp/[213.91.9.206]:5060 at 15:18:51.551582:
  ------------------------------------------------------------------------
  ACK sip:[EMAIL PROTECTED] SIP/2.0
  Max-Forwards: 10
  Record-Route: <sip:213.91.9.206:5060;lr=on>
  Via: SIP/2.0/UDP 213.91.9.206;branch=0
  Via: SIP/2.0/UDP 192.168.70.88:5062;branch=z9hG4bK261e.c5161123.0
  From: "cjb2002" 
<sip:[EMAIL PROTECTED];user=phone>;tag=32721-BF-00a49812-47837c974
  Call-ID: [EMAIL PROTECTED]
  To: <sip:[EMAIL PROTECTED];user=phone>;tag=F19jtD1g3Hmpp
  CSeq: 10745350 ACK
  User-Agent: OpenSer (1.1.0-notls (i386/linux))
  Content-Length: 0 


 ------- and then, later, when I choose to 'answer' ----------- 

  ------------------------------------------------------------------------
send 733 bytes to udp/[213.91.9.206]:5060 at 15:18:54.348987:
  ------------------------------------------------------------------------
  SIP/2.0 500 Overlapping Requests
  Via: SIP/2.0/UDP 213.91.9.206;branch=0
  Via: SIP/2.0/UDP 192.168.70.88:5062;branch=z9hG4bK261e.c5161123.0
  Via: SIP/2.0/UDP 192.168.70.242:5067;branch=0
  Via: SIP/2.0/UDP 
213.91.9.213:5060;received=192.168.70.20;branch=z9hG4bK-14AE-27B95
  From: "cjb2002" 
<sip:[EMAIL PROTECTED];user=phone>;tag=32721-BF-00a49812-47837c974
  To: <sip:[EMAIL PROTECTED];user=phone>;tag=F19jtD1g3Hmpp
  Call-ID: [EMAIL PROTECTED]
  CSeq: 10745350 INVITE
  Retry-After: 7 (Overlapping Requests)
  User-Agent: sofia-sip/1.12.7
  Accept: application/sdp
  Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, 
NOTIFY, REFER, UPDATE
  Supported: timer, 100rel
  Content-Length: 0 

  ------------------------------------------------------------------------
recv 509 bytes from udp/[213.91.9.206]:5060 at 15:18:54.572938:
  ------------------------------------------------------------------------
  ACK sip:[EMAIL PROTECTED] SIP/2.0
  Max-Forwards: 10
  Record-Route: <sip:213.91.9.206:5060;lr=on>
  Via: SIP/2.0/UDP 213.91.9.206;branch=0
  Via: SIP/2.0/UDP 192.168.70.88:5062;branch=z9hG4bK261e.c5161123.0
  From: "cjb2002" 
<sip:[EMAIL PROTECTED];user=phone>;tag=32721-BF-00a49812-47837c974
  Call-ID: [EMAIL PROTECTED]
  To: <sip:[EMAIL PROTECTED];user=phone>;tag=F19jtD1g3Hmpp
  CSeq: 10745350 ACK
  User-Agent: OpenSer (1.1.0-notls (i386/linux))
  Content-Length: 0 

  ------------------------------------------------------------------------
send 733 bytes to udp/[213.91.9.206]:5060 at 15:18:55.301320:
  ------------------------------------------------------------------------
  SIP/2.0 500 Overlapping Requests
  Via: SIP/2.0/UDP 213.91.9.206;branch=0
  Via: SIP/2.0/UDP 192.168.70.88:5062;branch=z9hG4bK261e.c5161123.0
  Via: SIP/2.0/UDP 192.168.70.242:5067;branch=0
  Via: SIP/2.0/UDP 
213.91.9.213:5060;received=192.168.70.20;branch=z9hG4bK-14AE-27B95
  From: "cjb2002" 
<sip:[EMAIL PROTECTED];user=phone>;tag=32721-BF-00a49812-47837c974
  To: <sip:[EMAIL PROTECTED];user=phone>;tag=F19jtD1g3Hmpp
  Call-ID: [EMAIL PROTECTED]
  CSeq: 10745350 INVITE
  Retry-After: 2 (Overlapping Requests)
  User-Agent: sofia-sip/1.12.7
  Accept: application/sdp
  Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, 
NOTIFY, REFER, UPDATE
  Supported: timer, 100rel
  Content-Length: 0 

  ------------------------------------------------------------------------
send 883 bytes to udp/[213.91.9.206]:5060 at 15:18:55.365311:
  ------------------------------------------------------------------------
  SIP/2.0 500 Internal Server Error
  Via: SIP/2.0/UDP 213.91.9.206;branch=0
  Via: SIP/2.0/UDP 192.168.70.88:5062;branch=z9hG4bK261e.c5161123.4
  Via: SIP/2.0/UDP 192.168.70.242:5067;branch=0
  Via: SIP/2.0/UDP 
213.91.9.213:5060;received=192.168.70.20;branch=z9hG4bK-14AE-27B95
  Record-Route: <sip:213.91.9.206:5060;lr=on>
  Record-Route: 
<sip:192.168.70.88:5062;proxy=yes;ftag=32721-BF-00a49812-47837c974;lr=on>
  Record-Route: <sip:192.168.70.242:5067;lr=on>
  From: "cjb2002" 
<sip:[EMAIL PROTECTED];user=phone>;tag=32721-BF-00a49812-47837c974
  To: <sip:[EMAIL PROTECTED];user=phone>;tag=F19jtD1g3Hmpp
  Call-ID: [EMAIL PROTECTED]
  CSeq: 10745350 INVITE
  Contact: <sip:192.168.255.102>
  User-Agent: sofia-sip/1.12.7
  Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, 
NOTIFY, REFER, UPDATE
  Supported: timer, 100rel
  Content-Length: 0 

  ------------------------------------------------------------------------
::1199287135 sofia_events.c at app_i_error(): NUA Error: Internal Server 
Error
Remote SDP: (null)
Call 10|terminated
Call terminated
  ::tag_null: 0
recv 509 bytes from udp/[213.91.9.206]:5060 at 15:18:55.555716:
  ------------------------------------------------------------------------
  ACK sip:[EMAIL PROTECTED] SIP/2.0
  Max-Forwards: 10
  Record-Route: <sip:213.91.9.206:5060;lr=on>
  Via: SIP/2.0/UDP 213.91.9.206;branch=0
  Via: SIP/2.0/UDP 192.168.70.88:5062;branch=z9hG4bK261e.c5161123.0
  From: "cjb2002" 
<sip:[EMAIL PROTECTED];user=phone>;tag=32721-BF-00a49812-47837c974
  Call-ID: [EMAIL PROTECTED]
  To: <sip:[EMAIL PROTECTED];user=phone>;tag=F19jtD1g3Hmpp
  CSeq: 10745350 ACK
  User-Agent: OpenSer (1.1.0-notls (i386/linux))
  Content-Length: 0 

 

Thanks in advance, 

Carlos 

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