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    Hi Chad,<br>
    <br>
    Thanks for the information.  I am reading an mseed file downloaded
    from IRIS Wilbur in 2011 or earlier, and it appears in my software
    that the location code is empty:<br>
<a class="moz-txt-link-freetext" href="https://dl.dropboxusercontent.com/u/35233023/Flores_Indonesia_1992.mseed">https://dl.dropboxusercontent.com/u/35233023/Flores_Indonesia_1992.mseed</a><br>
    <br>
    ???<br>
    <br>
    Thanks!<br>
    <br>
    Anthony<br>
    <br>
    PS - I have added a work around to this in my code, so you do not
    need to reply again on the weekend!<br>
    <br>
    <div class="moz-cite-prefix">On 21/06/2015 11:43, Chad Trabant
      wrote:<br>
    </div>
    <blockquote
      cite="mid:E570801B-C2CC-4EC7-95B3-D591C2645D9E@iris.washington.edu"
      type="cite">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <div class=""><br class="">
      </div>
      <div class="">Hi Anthony,</div>
      <div class=""><br class="">
      </div>
      <div class="">The 204 means "no matching data selected".  If you
        would like to see the error returned in your web browser try
        adding the parameter-value "nodata=404":</div>
      <div class=""><br class="">
      </div>
      <div class=""><a moz-do-not-send="true"
href="http://service.iris.edu/fdsnws/station/1/query?net=II&amp;sta=AAK&amp;loc=--&amp;cha=BHZ&amp;starttime=1992-12-12&amp;endtime=1992-12-12&amp;level=station&amp;nodata=404"
          class="">http://service.iris.edu/fdsnws/station/1/query?net=II&amp;sta=AAK&amp;loc=--&amp;cha=BHZ&amp;starttime=1992-12-12&amp;endtime=1992-12-12&amp;level=station&amp;nodata=404</a></div>
      <div class=""><br class="">
      </div>
      <div class="">If you submit the query with channel level details:</div>
      <div class=""><a moz-do-not-send="true"
href="http://service.iris.edu/fdsnws/station/1/query?net=II&amp;sta=AAK&amp;cha=BHZ&amp;starttime=1992-12-12&amp;endtime=1992-12-12&amp;level=channel&amp;nodata=404"
          class="">http://service.iris.edu/fdsnws/station/1/query?net=II&amp;sta=AAK&amp;cha=BHZ&amp;starttime=1992-12-12&amp;endtime=1992-12-12&amp;level=channel&amp;nodata=404</a></div>
      <div class=""><br class="">
      </div>
      <div class="">you'll see that there are no channels with empty
        location IDs.</div>
      <div class=""><br class="">
      </div>
      <div class="">Chad</div>
      <div class=""><br class="">
      </div>
      <div>
        <blockquote type="cite" class="">
          <div class="">On Jun 21, 2015, at 10:54 AM, Anthony Lomax &lt;<a
              moz-do-not-send="true" href="mailto:alomax@free.fr"
              class="">alomax@free.fr</a>&gt; wrote:</div>
          <br class="Apple-interchange-newline">
          <div class="">
            <meta content="text/html; charset=utf-8"
              http-equiv="Content-Type" class="">
            <div bgcolor="#FFFFFF" text="#000000" class=""> In fact,
              what is returned is:<br class="">
              Query:
              <a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://service.iris.edu/fdsnws/station/1/query?net=II&amp;sta=TLY&amp;loc=--&amp;cha=BHZ&amp;starttime=1992-12-12&amp;endtime=1992-12-12&amp;level=chan">http://service.iris.edu/fdsnws/station/1/query?net=II&amp;sta=TLY&amp;loc=--&amp;cha=BHZ&amp;starttime=1992-12-12&amp;endtime=1992-12-12&amp;level=chan</a><br
                class="">
              HTTP/1.1 204 No Content<br class="">
              <br class="">
              ???<br class="">
              <br class="">
              Thanks,<br class="">
              <br class="">
              Anthony<br class="">
              <br class="">
              <div class="moz-cite-prefix">On 21/06/2015 10:50, Anthony
                Lomax wrote:<br class="">
              </div>
              <blockquote cite="mid:55867AE8.7050905@free.fr"
                type="cite" class="">
                <meta http-equiv="content-type" content="text/html;
                  charset=utf-8" class="">
                Hi,<br class="">
                <br class="">
                The following gives nothing in my browser (no error, no
                change of page...):<br class="">
                <a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://service.iris.edu/fdsnws/station/1/query?net=II&amp;sta=AAK&amp;loc=--&amp;cha=BHZ&amp;starttime=1992-12-12&amp;endtime=1992-12-12&amp;level=station">http://service.iris.edu/fdsnws/station/1/query?net=II&amp;sta=AAK&amp;loc=--&amp;cha=BHZ&amp;starttime=1992-12-12&amp;endtime=1992-12-12&amp;level=station</a><br
                  class="">
                <br class="">
                If I remove the loc=--, it works fine:<br class="">
                <a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://service.iris.edu/fdsnws/station/1/query?net=II&amp;sta=AAK&amp;cha=BHZ&amp;starttime=1992-12-12&amp;endtime=1992-12-12&amp;level=station">http://service.iris.edu/fdsnws/station/1/query?net=II&amp;sta=AAK&amp;cha=BHZ&amp;starttime=1992-12-12&amp;endtime=1992-12-12&amp;level=station</a><br
                  class="">
                <br class="">
                Doc says:<br class="">
                loc[ation]     00     Select one or more SEED location
                identifier. Use -- for “Blank” location IDs (ID’s
                containing 2 spaces). Accepts wildcards and lists.
                Accepts exclusions.<br class="">
                <br class="">
                Am I missing something?<br class="">
                <br class="">
                Thanks,<br class="">
                <br class="">
                Anthony Lomax<br class="">
                <br class="">
                <div class="moz-signature">-- <br class="">
                  Sent from my iClayTablet <br class="">
                  <br class="">
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                    class=""> <br class="">
                     <b style="color:darkred; font-size:larger"
                    class="">Anthony Lomax</b> <br class="">
                     <b style="color:dimgray;" class="">161 Allée du
                    Micocoulier, 06370 Mouans-Sartoux, France</b> <br
                    class="">
                     <b style="color:dimgray;" class=""> tel: +33 (0)4
                    93 75 25 02    e-mail: <a moz-do-not-send="true"
                      href="mailto:anthony@alomax.net" class="">anthony@alomax.net</a>
                       web: <a moz-do-not-send="true"
                      href="http://www.alomax.net/" class="">http://www.alomax.net</a>
                  </b> <br class="">
                  <br class="">
                     <b style="color:darkgreen;" class="">Twitter: </b>
                  <b style="color:dimgray;" class=""><a
                      moz-do-not-send="true"
                      href="http://twitter.com/ALomaxNet" class="">@ALomaxNet</a></b>
                  <br class="">
                     <b style="color:darkgreen;" class="">Science &amp;
                    Special Topics: </b> <b style="color:dimgray;"
                    class=""><a moz-do-not-send="true"
                      href="http://www.alomax.net/science" class="">http://www.alomax.net/science</a></b>
                  <br class="">
                     <b style="color:darkgreen;" class="">Software: </b>
                  <b style="color:dimgray;" class=""><a
                      moz-do-not-send="true"
                      href="http://www.alomax.net/software" class="">http://www.alomax.net/software</a></b>
                  <b style="color:darkgreen;" class=""> - updates: </b>
                  <b style="color:dimgray;" class=""><a
                      moz-do-not-send="true"
                      href="https://twitter.com/ALomaxNet" class="">https://twitter.com/ALomaxNet</a></b>
                  <br class="">
                  <hr style="position:absolute; left:0px; width:50%;"
                    class=""> </div>
              </blockquote>
              <br class="">
              <div class="moz-signature">-- <br class="">
                Sent from my iClayTablet <br class="">
                <br class="">
                <hr style="position:absolute; left:0px; width:70%;"
                  class=""> <br class="">
                   <b style="color:darkred; font-size:larger" class="">Anthony
                  Lomax</b> <br class="">
                   <b style="color:dimgray;" class="">161 Allée du
                  Micocoulier, 06370 Mouans-Sartoux, France</b> <br
                  class="">
                   <b style="color:dimgray;" class=""> tel: +33 (0)4 93
                  75 25 02    e-mail: <a moz-do-not-send="true"
                    href="mailto:anthony@alomax.net" class="">anthony@alomax.net</a>
                     web: <a moz-do-not-send="true"
                    href="http://www.alomax.net/" class="">http://www.alomax.net</a>
                </b> <br class="">
                <br class="">
                   <b style="color:darkgreen;" class="">Twitter: </b>
                <b style="color:dimgray;" class=""><a
                    moz-do-not-send="true"
                    href="http://twitter.com/ALomaxNet" class="">@ALomaxNet</a></b>
                <br class="">
                   <b style="color:darkgreen;" class="">Science &amp;
                  Special Topics: </b> <b style="color:dimgray;"
                  class=""><a moz-do-not-send="true"
                    href="http://www.alomax.net/science" class="">http://www.alomax.net/science</a></b>
                <br class="">
                   <b style="color:darkgreen;" class="">Software: </b>
                <b style="color:dimgray;" class=""><a
                    moz-do-not-send="true"
                    href="http://www.alomax.net/software" class="">http://www.alomax.net/software</a></b>
                <b style="color:darkgreen;" class=""> - updates: </b> <b
                  style="color:dimgray;" class=""><a
                    moz-do-not-send="true"
                    href="https://twitter.com/ALomaxNet" class="">https://twitter.com/ALomaxNet</a></b>
                <br class="">
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                  class=""> </div>
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            _______________________________________________<br class="">
            webservices mailing list<br class="">
            <a moz-do-not-send="true"
              href="mailto:webservices@iris.washington.edu" class="">webservices@iris.washington.edu</a><br
              class="">
            <a class="moz-txt-link-freetext" href="http://www.iris.washington.edu/mailman/listinfo/webservices">http://www.iris.washington.edu/mailman/listinfo/webservices</a><br
              class="">
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        </blockquote>
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      <br class="">
      <br>
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      <br>
      <pre wrap="">_______________________________________________
webservices mailing list
<a class="moz-txt-link-abbreviated" href="mailto:webservices@iris.washington.edu">webservices@iris.washington.edu</a>
<a class="moz-txt-link-freetext" href="http://www.iris.washington.edu/mailman/listinfo/webservices">http://www.iris.washington.edu/mailman/listinfo/webservices</a>
</pre>
    </blockquote>
    <br>
    <div class="moz-signature">-- <br>
      Sent from my iClayTablet <br>
      <br>
      <hr style="position:absolute; left:0px; width:70%;"> <br>
         <b style="color:darkred; font-size:larger">Anthony Lomax</b> <br>
         <b style="color:dimgray;">161 Allée du Micocoulier, 06370
        Mouans-Sartoux, France</b> <br>
         <b style="color:dimgray;"> tel: +33 (0)4 93 75 25 02   
        e-mail: <a href="mailto:anthony@alomax.net">anthony@alomax.net</a>
           web: <a href="http://www.alomax.net/">http://www.alomax.net</a>
      </b> <br>
      <br>
         <b style="color:darkgreen;">Twitter: </b> <b
        style="color:dimgray;"><a href="http://twitter.com/ALomaxNet">@ALomaxNet</a></b>
      <br>
         <b style="color:darkgreen;">Science &amp; Special Topics: </b>
      <b style="color:dimgray;"><a href="http://www.alomax.net/science">http://www.alomax.net/science</a></b>
      <br>
         <b style="color:darkgreen;">Software: </b> <b
        style="color:dimgray;"><a href="http://www.alomax.net/software">http://www.alomax.net/software</a></b>
      <b style="color:darkgreen;"> - updates: </b> <b
        style="color:dimgray;"><a href="https://twitter.com/ALomaxNet">https://twitter.com/ALomaxNet</a></b>
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