Hi, I have an incoming INVITE being received which contains a multipart body, i.e. an SDP and another custom body. The rx_data is then being cloned using pjsip_rx_data_clone that calls down into multipart_clone_data. Within this function the pj_list_push_back encounters a problem using the dst multipart_data containing a list part_head. I believe it is a simple fix to initialize the dst->part_head list using pj_list_init(&dst->part_head); Using version 2.1.0 of PJSip library, proposed patch attached for this one-liner. Nick -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20140312/597bcd20/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: sip_multipart.c.patch Type: application/octet-stream Size: 46 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20140312/597bcd20/attachment-0001.patch>