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    All surfaces are given names.<br>
    When a surface is created in TRNSYS3D, it is automatically given an
    alphanumeric name, for example A0737D.<br>
    <p>In contrast, TRNBuild identifies all surfaces by number.
      Therefore, when the IDF is imported into TRNBuild, it is assigned
      a surface number instead of the name.</p>
    <p>Thereafter, when exporting from TRNBuild to an IDF, the surface
      number will be used as the name.</p>
    <p>In your case, it seems that TRNBuild did not export the surface
      (210) to the IDF correctly.<br>
      Or the surface may be so small that it is not visible.<br>
      <br>
      If you are having difficulty finding the surface, I recommend that
      you delete and recreate the zone to which the surface belongs.</p>
    <p>Yuichi<br>
    </p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 2023/04/05 12:55, H via TRNSYS-users
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:347c74d.bc1.1874f8e33a5.Coremail.pdhvac@126.com">
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        <p style="margin: 0;">Dear Yuichi and all</p>
        <div style="margin: 0;">Thanks for your reply. Howerver, it
          still cannot find the surface 210 as shown in the following
          picture. I think the reason is the area of the 210 surface is
          0 as  shown in the following picture. What is the rule of
          surface numbers  by TRNBuild to the IDF file? This can help me
          find the wrong surface(210). The error occured because the
          area of the 210 surface is 0.</div>
        <p style="margin: 0;"><br>
        </p>
        <div style="margin: 0;"><img
            src="cid:part1.v0flF5sm.NW5q03ye@qcd.co.jp" orgwidth="1358"
            orgheight="725" data-image="1" style="width: 804px; height:
            429px;" class=""></div>
        <p style="margin: 0;"><br>
        </p>
        <div style="margin: 0;"><img
            src="cid:part2.vEZ34wTW.JJloc8uS@qcd.co.jp" orgwidth="660"
            orgheight="107" data-image="1" style="width: 660px; height:
            107px; border: none;" class=""></div>
        <div><img src="cid:part3.69K0i8BU.sPIVwx6k@qcd.co.jp"
            orgwidth="1187" orgheight="613" data-image="1" style="width:
            804px; height: 415px; border: none;" class=""></div>
        <div><br>
        </div>
        <div>                                     </div>
        <div>At 2023-04-05 08:37:09, "Yuichi Yasuda via TRNSYS-users"
          <a class="moz-txt-link-rfc2396E" href="mailto:trnsys-users@lists.onebuilding.org"><trnsys-users@lists.onebuilding.org></a> wrote:</div>
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          MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
          <p>Surface numbers are assigned by TRNBuild.<br>
            In other words, you cannot find the surface by the number
            because it does not exist in TRNSYS3D.<br>
            <br>
            Try the following steps.<br>
            <br>
            1. First of all, export the IDF file from TRNBuild. This
            will export the surface numbers assigned by TRNBuild to the
            IDF file.<br>
            2. Then open the IDF file in TRNSYS3D.<br>
            3. In the Surface Search dialog, enter the Surface number in
            the Name field. In your case, enter 210.<br>
            4. Click on the Search Entire Model button. <br>
          </p>
          <p>Now only the surface will be shown.</p>
          <p><img src="cid:part4.8prE13pK.54g3Ua0q@qcd.co.jp" alt=""
              class="" width="876" height="541"></p>
          <p>I hope this works.<br>
          </p>
          <p>Yuichi<br>
            <br>
          </p>
          <div class="moz-cite-prefix">On 2023/04/03 15:54, H via
            TRNSYS-users wrote:<br>
          </div>
          <blockquote type="cite"
            cite="mid:284c76e3.51fe.18745e559b8.Coremail.pdhvac@126.com">
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              style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial">
              <p class="MsoNormal"><span lang="EN-US">Hello, everyone,<o:p></o:p></span></p>
              <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span> There
                is an error when I export the model of TRNSYS3D to the
                TRNSYS , as shown in following picture. How can I find
                the 210 surface in sketchup? How can I solve this
                problem?</p>
              <p class="MsoNormal"><img
                  src="cid:part5.CH9lXnCo.07pkk0Ib@qcd.co.jp"
                  orgwidth="660" orgheight="107" data-image="1"
                  style="width: 660px; height: 107px; border: none;"
                  class=""><img
                  src="cid:part6.9bdd3zFH.yi8UCFoj@qcd.co.jp"
                  orgwidth="1187" orgheight="613" data-image="1"
                  style="width: 804px; height: 415px; border: 1px solid
                  rgb(153, 153, 153);" class=""></p>
              <p class="MsoNormal"><span lang="EN-US"><o:p>             
                                                                       
                                            </o:p></span>Best regards,</p>
              <br>
            </div>
            <br>
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            <pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
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          <div class="moz-signature">-- <br>
            <p><br>
            </p>
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
    </blockquote>
    <div class="moz-signature">-- <br>
      <p>
        安田 雄市 Yuichi Yasuda<br>
        株式会社クアトロ quattro corporate design co.,ltd<br>
        <a href="http://qcd.co.jp/" class="moz-txt-link-freetext">http://qcd.co.jp/</a><br>
        Tel:070-8407-3774(直通)<br>
        Tel: 03-5768-6744(代表) Fax:03-5768-6745<br>
        mail: <a class="moz-txt-link-abbreviated" href="mailto:yasuda@qcd.co.jp">yasuda@qcd.co.jp</a></p>
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