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    Sofie,<br>
      Its hard to know without looking at the idf file itself. Often
    times, this is caused by a wall whose normal vector is pointing the
    wrong way. The fix is simple: you simply have to select "reverse
    faces." The hard part is to figure out which wall is giving you
    trouble. Often times, you can look in the *.b17 for an adjacent wall
    whose adjacency is set to "undefined" and then start looking back in
    the idf file in Sketchup/Trnsys3D.<br>
    Best,<br>
     David<br>
    <br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 11/7/2012 06:32, Sofie Van den Bergh
      wrote:<br>
    </div>
    <blockquote
cite="mid:6F92F215E12DCF4F9EE35523A0F6FF0205FC170A@SRV-MAIL2-ROE.VK.Roeselare.be"
      type="cite">
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        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US">Dear,
          </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US">When opening my multizone building model from
            sketchup(.idf) in Trnsys. Open studio, I receive the error
            for several zones that “an adjacent wall is not found”.
          </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US">Opening the idf in sketchup again and checking
            each surface, they all are modeled correctly, the wireframe
            model is pure (no overlappings or mismachings) and the
            boundary conditions are inserted correctly. </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US">What is possibly causing this error?
          </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US">What happens if I press “set to undefined” when
            opening the idf in Trnsys?
          </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US">Thanks in advance for your help,
          </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif";
            color:black" lang="EN-US">ir.-arch. Sofie Van Den Bergh</span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif";
            color:black" lang="EN-US">Project Engineer MEP</span></p>
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            color:black" lang="EN-US"></span></p>
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      <pre wrap="">_______________________________________________
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</pre>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
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<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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