On Fri, Dec 25, 2009 at 12:36 PM, Liu Jahow <jahowliu at gmail.com> wrote: > Hi All, > > I have put pjsip 1.4.0 on my target device, but I sometimes?encounter the > assertion for "invalid operation step" in sip_transport.c. > I think this is a known problem with TCP. It can happen when ACK is sent with TCP (to different destination than the original INVITE), and if the TCP connection has not been established before another 200/OK retransmission arrives (and hence the ACK needs to be retransmitted). I just created http://trac.pjsip.org/repos/ticket/1011 for this. Thanks for the report Cheers Benny
