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    <div class="moz-cite-prefix"><font size="-1"><font face="Arial">Hi,<br>
          <br>
          <font size="-1">this error also occuried <font size="-1">after
              deleted a <font size="-1">thermal zone in s<font
                  size="-1">kecthup,</font> <font size="-1">with</font>
                a<font size="-1">n idf file updated<font size="-1"> <font
                      size="-1">from a trnbuild exportation<font
                        size="-1">. <br>
                        When you re import<font size="-1"> the <font
                            size="-1">modifie<font size="-1">d idf file,
                              <font size="-1">T</font>rnbuild <font
                                size="-1">show  empty <font size="-1">thermal
                                  zone and give</font>s that error. <br>
                                <font size="-1">b17 file is created<font
                                    size="-1">. You <font size="-1">have</font>
                                    to del<font size="-1">e<font
                                        size="-1">te empty thermal z<font
                                          size="-1">one directly in
                                          TRNBUILD.<br>
                                          <font size="-1"><font
                                              size="-1">What you can do
                                              :<br>
                                            </font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font>
      <ol>
        <li><font size="-1"><font face="Arial">open trnbuild</font></font></li>
        <li><font size="-1"><font face="Arial"><font size="-1">File <font
                  size="-1">/ Update<font size="-1"> Trnsys 3D file</font></font></font></font></font></li>
        <li><font size="-1"><font face="Arial"><font size="-1"><font
                  size="-1"><font size="-1"><font size="-1">select your
                      idf file and your h<font size="-1">emi<font
                          size="-1">sphere</font></font></font></font></font></font></font></font></li>
        <li><font size="-1"><font face="Arial"><font size="-1"><font
                  size="-1"><font size="-1"><font size="-1"><font
                        size="-1"><font size="-1"><font size="-1">import
                            your idf file</font></font></font></font></font></font></font></font></font></li>
        <li><font size="-1"><font face="Arial"><font size="-1"><font
                  size="-1"><font size="-1"><font size="-1"><font
                        size="-1"><font size="-1"><font size="-1"><font
                              size="-1">delete empty zones</font></font></font></font></font></font></font></font></font></font></li>
      </ol>
      <p><font size="-1"><font face="Arial">I <font size="-1">import
              your id<font size="-1">f file with trnbuild and see lots
                of <font size="-1">empty <font size="-1">zones. Y<font
                      size="-1">o</font>u have t<font size="-1">o</font>
                    delete them.</font></font></font></font></font></font><br>
      </p>
      <font size="-1"><font face="Arial"><font size="-1"><font size="-1"><font
                size="-1"><font size="-1"><font size="-1"><font
                      size="-1"><font size="-1"><font size="-1"><font
                            size="-1"><font size="-1"><font size="-1"><font
                                  size="-1"><font size="-1"><font
                                      size="-1"><font size="-1"><font
                                          size="-1"><font size="-1">Best
                                            regards</font></font></font></font></font></font></font></font></font></font><br>
                      </font></font></font></font></font></font></font></font></font>
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                <center><a href="http://www.itf.biz"><img
                      src="cid:part1.01020005.01050801@itf.biz"
                      alt="www.itf.biz" border="0" height="103"
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              </td>
              <td colspan="2"><font color="#000000" face="CALIBRI"
                  size="2">Adrien JEZEQUEL<br>
                  Simulations Thermiques Dynamiques</font></td>
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              <td align="LEFT"> <font color="#0000FF" face="CALIBRI"
                  size="4"><b>ITF</b></font><br>
              </td>
              <td><font color="#0000FF" face="CALIBRI" size="2">62, Rue
                  du Bolliet<br>
                  73230 St Alban Leysse<br>
                  FRANCE<br>
                </font></td>
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              <td align="LEFT" width="40"><font color="#0000FF"
                  face="CALIBRI" size="2"> Phone :<br>
                  Fax :<br>
                  Mail:<br>
                </font>
              </td>
              <td><font color="#0000FF" face="CALIBRI" size="2"> +33(0)
                  479 750 029<br>
                  +33(0) 479 852 122<br>
                  <a class="moz-txt-link-freetext"
                    href="mailto:a.jezequel@itf.biz">a.jezequel@itf.biz</a>
                  ou <a class="moz-txt-link-freetext"
                    href="mailto:aj@itf.biz">aj@itf.biz</a></font></td>
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        <i><font color="#008000" face="CALIBRI" size="1">Afin de
            contribuer au respect de l'environnement, merci de
            n'imprimer cet e-mail que si nécessaire<br>
            <font color="#008000" face="CALIBRI" size="1">Please,
              consider our environmental responsability before printing
              this email<br>
            </font></font></i><font color="#008000" face="CALIBRI"
          size="1"><font color="#008000" face="CALIBRI" size="1">
          </font></font></div>
      Le 25/03/2013 02:25, Brian Raichle a écrit :<br>
    </div>
    <blockquote
cite="mid:CAP==bF_xLstM_kzCKaZ-J8U4_Xfgo5odtLwPGeO7bA8m5rTzag@mail.gmail.com"
      type="cite">Hi Jorn,<br>
      I've seen this error when there's a line left, for example if you
      deleted a surface but didn't delete all the borders (the ones on
      top of other borders are tough!). Maybe that's it.<br>
      Best,<br>
      Brian <br>
      <br>
      <div class="gmail_quote">On Sun, Mar 24, 2013 at 4:13 PM, Jorn
        Ostijn <span dir="ltr"><<a moz-do-not-send="true"
            href="mailto:jorn.o@vkgroup.be" target="_blank">jorn.o@vkgroup.be</a>></span>
        wrote:<br>
        <blockquote class="gmail_quote" style="margin:0 0 0
          .8ex;border-left:1px #ccc solid;padding-left:1ex">
          <div>
            <div style="direction:ltr;font-size:10pt;font-family:Tahoma">Hey
              everyone,<br>
              <br>
              When making a 3D Building project (multizone), I
              encountered an error when trying to open my .idf-model
              (google sketchup).
              <br>
              The error is the following:<br>
              "At least 2 surfaces are required per zone!"<br>
              <br>
              What 's weird about this error, is that I can not find a
              zone consisting of less than 2 surfaces + I can't find
              "surface -1" in my model.<br>
              <br>
              I searched but have not been able to solve this error yet.<br>
              Is anyone familiar with this error? Where lies the
              problem?<br>
              You can find my .idf-model in annexe. <br>
              <br>
              Thank you very much for helping me out,<br>
              <br>
              Jorn Ostijn<br>
              <br>
              Project engineer<br>
              VK Engineering<br>
              <br>
              <br>
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                style="width:800px;min-height:450px"><br>
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      -- <br>
      Brian Raichle<br>
      Department of Technology and Environmental Design<br>
      Appalachian State University<br>
      <br>
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