<blockquote>
<p>This may be related to log</p>
<pre><code>16(27) ERROR: {1 21 INVITE 1851253425} <core> [core/msg_translator.c:3290]: sip_msg_apply_changes(): cannot apply msg changes after adding record-route header - it breaks conditional 2nd header
</code></pre>
<p>Think in this case must be send original INVITE.</p>
</blockquote>
<p>Hi.<br>
You need to do record_route() after convert body to multipart.<br>
I have this case in production.</p>
<pre><code>       if( is_method("INVITE") && has_body("application/sdp"))
       {
               if (msg_apply_changes())
               {
                   xlog("L_INFO", "ISUP 0 Changes Applied Succesfully");
               }
               set_body_multipart(,"2123894789_1257887457");
               if (msg_apply_changes())
               {
                   xlog("L_INFO", "ISUP 1 Changes Applied Succesfully");
               }
                   append_body_part_hex("01 10 48 00 0a 00 02 09 07 03 90 90 13 71 32 20 0a 04 02 13 73 12 00","application/isup;version=itu-t92+","signal;handling=optional");
                   if(msg_apply_changes())
                   {
                       xlog("L_INFO", "ISUP 2 Changes Applied Succesfully $rU \n");
                   }
         record_route();
        }
</code></pre>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br />You are receiving this because you are subscribed to this thread.<br />Reply to this email directly, <a href="https://github.com/kamailio/kamailio/issues/1719#issuecomment-438286608">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/AF36Zbo6leautEZcM5pj6x5LF9LdOmfKks5uutgbgaJpZM4YYKPv">mute the thread</a>.<img src="https://github.com/notifications/beacon/AF36ZXDntPntIGs167C6THEPMW4sdGX7ks5uutgbgaJpZM4YYKPv.gif" height="1" width="1" alt="" /></p>
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