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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Dear all,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span 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-US style='font-size:
10.0pt;font-family:Arial'>I’m using the type 534 storage tank of the TESS
libraries. I made a small change in the code, I set the maximum number of ports
to 20. Beside other components I use an online plotter with file to see and
print the tank nodal temperatures. The system runs ok, but if I change the
double port of the solar circle I get an invalid floating point operation
error. This happens only if I have the respective plotter switched on and the tank
energy balance error connected to the plotter. As soon as I switch off the
plotter or disconnect the balance error everything is alright. In the output
file of the plotter I get normal values for the balance error and at some times
it is written “NaN”. Those are probably the times where I get the
error.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US 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-US style='font-size:
10.0pt;font-family:Arial'>This is no problem for me as I don’t necessarily
need the balance error and so I don’t need real help from you. I am just
curious what the reason might be and if anybody of you ended up with the same behavior.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US 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-US style='font-size:
10.0pt;font-family:Arial'>Thanks for any replies<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US 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-US style='font-size:
10.0pt;font-family:Arial'>Jens Apel<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Technical University of Berlin<o:p></o:p></span></font></p>
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