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    Hello,<br>
    <br>
    thank you for your response.<br>
    <br>
    Maybe I have to read the RFC6665 :)<br>
    <br>
    Regards<br>
    <br>
    <div class="moz-cite-prefix">El 22/02/2015 a las 06:05, Podrigal,
      Aron escribió:<br>
    </div>
    <blockquote
cite="mid:CANJp-yhJ5h4OkM9vm_Etrk8yGvy2BG+aT=0c0_Eny6WTs_sf_Q@mail.gmail.com"
      type="cite">
      <div dir="ltr">The reason for the transaction is because of
        re-transmission. Otherwise, In the case where the original reply
        from opensips  has been lost on the network. the client will
        re-transmit the SUBSCRIBE and <span style="color:rgb(0,0,0)">will
          be seen as duplicate CSEQ by<br>
        </span><span style="color:rgb(0,0,0)">presence module with 412
          error code.</span></div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Sat, Feb 21, 2015 at 8:33 PM,
          campusvtv <span dir="ltr">&lt;<a moz-do-not-send="true"
              href="mailto:campusvtv@gmail.com" target="_blank">campusvtv@gmail.com</a>&gt;</span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
            <br>
            a basic question.<br>
            <br>
            In this block:<br>
            <br>
            route[handle_presence] {<br>
                    if (!t_newtran()) {<br>
                            sl_reply_error();<br>
                            exit;<br>
                    }<br>
            <br>
                    if(is_method("PUBLISH")) {<br>
                            handle_publish();<br>
                    }<br>
                    else<br>
                    if( is_method("SUBSCRIBE")) {<br>
                            handle_subscribe();<br>
                    }<br>
                    exit;<br>
            }<br>
            <br>
            whic is the meaning of:<br>
            <br>
            if (!t_newtran()) {<br>
                            sl_reply_error();<br>
                            exit;<br>
                    }<br>
            <br>
            in other words why I have to use t_newtran function.<br>
            <br>
            Thank you.<br>
            <br>
            Regards<br>
            <br>
            <br>
            <br>
            _______________________________________________<br>
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            <a moz-do-not-send="true"
              href="mailto:Users@lists.opensips.org" target="_blank">Users@lists.opensips.org</a><br>
            <a moz-do-not-send="true"
              href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users"
              target="_blank">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a><br>
          </blockquote>
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      <pre wrap="">_______________________________________________
Users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Users@lists.opensips.org">Users@lists.opensips.org</a>
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</pre>
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