<p>I've cloned and compiled the latest:</p>

<p>kamailio -v<br>
version: kamailio 5.0.0-dev6 (x86_64/linux) 276ccc-dirty<br>
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES<br>
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB<br>
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.<br>
id: 276ccc -dirty<br>
compiled on 10:07:00 Sep 29 2016 with gcc 5.4.0</p>

<p>But I still get the same issue:</p>

<p>Sep 29 10:14:43 sbc /usr/local/sbin/kamailio[47154]: ERROR:  [msg_translator.c:418]: clen_builder(): no message body found (missing crlf?) [[INVITE sip:<a href="mailto:+447580842258@sbc1.o365.voice.redcentric">+447580842258@sbc1.o365.voice.redcentric</a>;user=phone SIP/2.0#015#012FROM: "Peter Pulham"sip:+441132214578@o365.redcentric.training;user=phone;epid=4BE95AECD5;tag=7d6f29c5a0#015#012TO: sip:+447580842258@sbc1.o365.voice.redcentric;user=phone<a href="https://github.com/kamailio/kamailio/issues/15" class="issue-link js-issue-link" data-url="https://github.com/kamailio/kamailio/issues/15" data-id="52852064" data-error-text="Failed to load issue title" data-permission-text="Issue title is private">#15</a>#012CSEQ: 17068 INVITE#015#012CALL-ID: f7b8ef80-c45d-45dc-ac79-9cc38d054238#015#012MAX-FORWARDS: 69#015#012VIA: SIP/2.0/TCP 192.168.4.153:57850;branch=z9hG4bKfe6465#015#012CONTACT: sip:MediationServer.o365.voice.redcentric:5068;transport=Tcp;maddr=192.168.4.153;ms-opaque=7d1538e1e699b871<a href="https://github.com/kamailio/kamailio/issues/15" class="issue-link js-issue-link" data-url="https://github.com/kamailio/kamailio/issues/15" data-id="52852064" data-error-text="Failed to load issue title" data-permission-text="Issue title is private">#15</a>#012CONTENT-LENGTH: 342#015#012SUPPORTED: 100rel#015#012USER-AGENT: RTCC/6.0.0.0 MediationServer#015#012CONTENT-TYPE: application/sdp#015#012ALLOW: ACK#015#012P-ASSERTED-IDENTITY: "Peter Pulham"sip:peter.pulham@o365.redcentric.training,tel:+441132214578<a href="https://github.com/kamailio/kamailio/issues/15" class="issue-link js-issue-link" data-url="https://github.com/kamailio/kamailio/issues/15" data-id="52852064" data-error-text="Failed to load issue title" data-permission-text="Issue title is private">#15</a>#012Privacy: id#015#012Allow: CANCEL,BYE,INVITE,PRACK,UPDATE#015#012#015#012v=0#015#012o=- 61 1 IN IP4 192.168.4.153#015#012s=session#015#012c=IN IP4 192.168.4.153#015#012b=CT:1000#015#012t=0 0#015#012m=audio 51284 RTP/AVP 97 101 13 0 8#015#012c=IN IP4 192.168.4.153#015#012a=rtcp:51285#015#012a=label:Audio#015#012a=sendrecv#015#012a=rtpmap:97 RED/8000#015#012a=rtpmap:101 telephone-event/8000#015#012a=fmtp:101 0-16#015#012a=rtpmap:13 CN/8000#015#012a=rtpmap:0 PCMU/8000#015#012a=rtpmap:8 PCMA/8000#015#012a=ptime:20#015#012]]<br>
Sep 29 10:14:43 sbc /usr/local/sbin/kamailio[47154]: ERROR:  [msg_translator.c:1965]: build_req_buf_from_sip_req(): Error while adjusting Content-Length<br>
Sep 29 10:14:43 sbc /usr/local/sbin/kamailio[47154]: ERROR: tm [t_fwd.c:476]: prepare_new_uac(): could not build request<br>
Sep 29 10:14:43 sbc /usr/local/sbin/kamailio[47154]: ERROR: tm [t_fwd.c:1741]: t_forward_nonack(): ERROR: t_forward_nonack: failure to add branches<br>
Sep 29 10:14:43 sbc /usr/local/sbin/kamailio[47154]: ERROR: tm [tm.c:1426]: _w_t_relay_to(): t_forward_noack failed</p>

<p>Many thanks</p>

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<script type="application/json" data-scope="inboxmarkup">{"api_version":"1.0","publisher":{"api_key":"05dde50f1d1a384dd78767c55493e4bb","name":"GitHub"},"entity":{"external_key":"github/kamailio/kamailio","title":"kamailio/kamailio","subtitle":"GitHub repository","main_image_url":"https://cloud.githubusercontent.com/assets/143418/17495839/a5054eac-5d88-11e6-95fc-7290892c7bb5.png","avatar_image_url":"https://cloud.githubusercontent.com/assets/143418/15842166/7c72db34-2c0b-11e6-9aed-b52498112777.png","action":{"name":"Open in GitHub","url":"https://github.com/kamailio/kamailio"}},"updates":{"snippets":[{"icon":"PERSON","message":"@scfcplummy in #789: I've cloned and compiled the latest:\r\n\r\nkamailio -v\r\nversion: kamailio 5.0.0-dev6 (x86_64/linux) 276ccc-dirty\r\nflags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES\r\nADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB\r\npoll method support: poll, epoll_lt, epoll_et, sigio_rt, select.\r\nid: 276ccc -dirty\r\ncompiled on 10:07:00 Sep 29 2016 with gcc 5.4.0\r\n\r\nBut I still get the same issue:\r\n\r\nSep 29 10:14:43 sbc /usr/local/sbin/kamailio[47154]: ERROR: \u003ccore\u003e [msg_translator.c:418]: clen_builder(): no message body found (missing crlf?) [[INVITE sip:+447580842258@sbc1.o365.voice.redcentric;user=phone SIP/2.0#015#012FROM: \"Peter Pulham\"\u003csip:+441132214578@o365.redcentric.training;user=phone\u003e;epid=4BE95AECD5;tag=7d6f29c5a0#015#012TO: \u003csip:+447580842258@sbc1.o365.voice.redcentric;user=phone\u003e#015#012CSEQ: 17068 INVITE#015#012CALL-ID: f7b8ef80-c45d-45dc-ac79-9cc38d054238#015#012MAX-FORWARDS: 69#015#012VIA: SIP/2.0/TCP 192.168.4.153:57850;branch=z9hG4bKfe6465#015#012CONTACT: \u003csip:MediationServer.o365.voice.redcentric:5068;transport=Tcp;maddr=192.168.4.153;ms-opaque=7d1538e1e699b871\u003e#015#012CONTENT-LENGTH: 342#015#012SUPPORTED: 100rel#015#012USER-AGENT: RTCC/6.0.0.0 MediationServer#015#012CONTENT-TYPE: application/sdp#015#012ALLOW: ACK#015#012P-ASSERTED-IDENTITY: \"Peter Pulham\"\u003csip:peter.pulham@o365.redcentric.training\u003e,\u003ctel:+441132214578\u003e#015#012Privacy: id#015#012Allow: CANCEL,BYE,INVITE,PRACK,UPDATE#015#012#015#012v=0#015#012o=- 61 1 IN IP4 192.168.4.153#015#012s=session#015#012c=IN IP4 192.168.4.153#015#012b=CT:1000#015#012t=0 0#015#012m=audio 51284 RTP/AVP 97 101 13 0 8#015#012c=IN IP4 192.168.4.153#015#012a=rtcp:51285#015#012a=label:Audio#015#012a=sendrecv#015#012a=rtpmap:97 RED/8000#015#012a=rtpmap:101 telephone-event/8000#015#012a=fmtp:101 0-16#015#012a=rtpmap:13 CN/8000#015#012a=rtpmap:0 PCMU/8000#015#012a=rtpmap:8 PCMA/8000#015#012a=ptime:20#015#012]]\r\nSep 29 10:14:43 sbc /usr/local/sbin/kamailio[47154]: ERROR: \u003ccore\u003e [msg_translator.c:1965]: build_req_buf_from_sip_req(): Error while adjusting Content-Length\r\nSep 29 10:14:43 sbc /usr/local/sbin/kamailio[47154]: ERROR: tm [t_fwd.c:476]: prepare_new_uac(): could not build request\r\nSep 29 10:14:43 sbc /usr/local/sbin/kamailio[47154]: ERROR: tm [t_fwd.c:1741]: t_forward_nonack(): ERROR: t_forward_nonack: failure to add branches\r\nSep 29 10:14:43 sbc /usr/local/sbin/kamailio[47154]: ERROR: tm [tm.c:1426]: _w_t_relay_to(): t_forward_noack failed\r\n\r\nMany thanks"}],"action":{"name":"View Issue","url":"https://github.com/kamailio/kamailio/issues/789#issuecomment-250414108"}}}</script>