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<div class=Section1><pre><font size=2 face="Courier New"><span lang=EN-GB
style='font-size:10.0pt'>Dear all,<o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span lang=EN-GB style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 face="Courier New"><span lang=EN-GB style='font-size:10.0pt'>I have a problem with the air flow network defined in TRNBuild when<o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span lang=EN-GB style='font-size:10.0pt'>using TRNFLOW. I define my interior zones, save the .bui file and close the TRNBuild window. <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span lang=EN-GB style='font-size:10.0pt'>However, when I edit again the same file in TRNBuild, all of the interior zone<o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span lang=EN-GB style='font-size:10.0pt'>nodes are automatically changed to nodes with constant pressure of 0<o:p></o:p></span></font></pre><pre><st1:place
w:st="on"><st1:State w:st="on"><font size=2 face="Courier New"><span
lang=EN-GB style='font-size:10.0pt'>Pa.</span></font></st1:State></st1:place><span
lang=EN-GB> Does anyone know why this happens and how could it be solved?<o:p></o:p></span></pre><pre><font
size=2 face="Courier New"><span lang=EN-GB style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 face="Courier New"><span lang=EN-GB style='font-size:10.0pt'>Thank you in advance for your help,<o:p></o:p></span></font></pre>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Met vriendelijke groet,<br>
Marit Béguin, junior projectleider<br>
Cauberg-Huygen R.I. B.V.<o:p></o:p></span></font></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><img
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