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<p>Javier,</p>
<p> This sounds like TRNSYS is getting in to an infinite
calculation loop inside one of its routines. The problem could be
occurring in the kernel, in one of the standard Types or in a
custom component. It is only possible to find out where the
problem occurs by running the simulation from a Fortran compiler
that allows you to step through the code. In our discussions
yesterday, you mentioned that you were developing your own
component. May I ask what compiler you are using and whether you
are able to run your simulation in debug mode from the compiler so
that you can step one line at a time through the code?</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 06/08/2017 08:11, Javier Vega via
TRNSYS-users wrote:<br>
</div>
<blockquote
cite="mid:CAEju=PqNjGR521cb-X1YHy1+KYR3d71cCyBp5A8wMkh=Cd+C7w@mail.gmail.com"
type="cite">
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<div><span style="font-size:12.8px">Jeff,</span></div>
<div><span style="font-size:12.8px"><br>
</span></div>
<div><span style="font-size:12.8px">When I say TRNEXE gets
"stuck" I mean it stops calculating at a certain timestep
but TRNEXE doesn't close nor prints any message in the list
file. It just stops and I can't use any of the display
options of the TRNEXE window. When I check windows task
administrator, TRNEXE is <b>Non-Responding</b> but using
somewhat 17% of my CPU. Also, my mouse cursor changes in the
TRNEXE window to the classical "loading" symbol.</span></div>
<div><span style="font-size:12.8px"><br>
</span></div>
<div><span style="font-size:12.8px">I assume this is due to non
convergence of a certain timestep? I was thinking that
because right now, if I start my simulation from Time=0,<b>
TRNEXE turns "Non-Responding" at the same timestep</b>.</span></div>
<div><span style="font-size:12.8px"><br>
</span></div>
<div><span style="font-size:12.8px">I'm attaching a couple of
images to illustrate the situation.</span></div>
<div><span style="font-size:12.8px"><br>
</span></div>
<div><span style="font-size:12.8px">Kind regards,</span></div>
<div><span style="font-size:12.8px">Javier Vega</span></div>
<span style="font-size:12.8px">
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<blockquote style="margin:0 0 0 40px;border:none;padding:0px">
<blockquote style="margin:0 0 0 40px;border:none;padding:0px"><span
style="font-size:12.8px">From: Jeff Thornton via
TRNSYS-users <<a moz-do-not-send="true"
href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a>></span></blockquote>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px"><span
style="font-size:12.8px">To: <a moz-do-not-send="true"
href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a></span></blockquote>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px"><span
style="font-size:12.8px">Cc: </span></blockquote>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px"><span
style="font-size:12.8px">Bcc: </span></blockquote>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px"><span
style="font-size:12.8px">Date: Wed, 07 Jun 2017 16:09:54
-0500</span></blockquote>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px"><span
style="font-size:12.8px">Subject: Re: [TRNSYS-users] How
to skip timesteps if they don't reach convergence?</span></blockquote>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px">
<div style="font-size:12.8px">
<p>TRNSYS will iterate until the iteration limit is
reached, write a warning message to the list file, and
then continue on to the next timestep. When you say
TRNEXE gets "stuck" what do you mean?</p>
</div>
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<div style="font-size:12.8px">
<p> </p>
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<div style="font-size:12.8px">
<p>Jeff</p>
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<div style="font-size:12.8px">
<p> </p>
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<pre style="white-space:pre-wrap">---</pre>
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<div>
<pre style="white-space:pre-wrap">Jeff Thornton</pre>
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<blockquote style="margin:0 0 0 40px;border:none;padding:0px">
<div style="font-size:12.8px">
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<pre style="white-space:pre-wrap">President - TESS LLC</pre>
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<blockquote style="margin:0 0 0 40px;border:none;padding:0px">
<div style="font-size:12.8px">
<div>
<pre style="white-space:pre-wrap">22 N. Carroll Street, Madison WI USA 53703</pre>
</div>
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</blockquote>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px">
<div style="font-size:12.8px">
<div>
<pre style="white-space:pre-wrap">Office: <a moz-do-not-send="true" href="tel:%28608%29%20274-2577" value="+16082742577" target="_blank">(608) 274-2577</a> Fax: <a moz-do-not-send="true" href="tel:%28608%29%20278-1475" value="+16082781475" target="_blank">(608) 278-1475</a></pre>
</div>
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<div style="font-size:12.8px">
<div>
<pre style="white-space:pre-wrap"><a moz-do-not-send="true" href="http://www.tess-inc.com/" target="_blank">www.tess-inc.com</a></pre>
</div>
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</blockquote>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px">
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<pre style="white-space:pre-wrap">E-Mail: <a moz-do-not-send="true" href="mailto:thornton@tess-inc.com" target="_blank">thornton@tess-inc.com</a></pre>
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<div style="font-size:12.8px">
<p>On 06/07/2017 3:30 pm, Javier Vega via TRNSYS-users
wrote:</p>
</div>
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<span style="font-size:12.8px"></span>
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<div>Hello TRNSYS users,</div>
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<div> </div>
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<div>I've noticed that some simulations finish with
messages that say that a certain component (or
components) doesn't reach convergence at certain
timesteps. The message is the following:</div>
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<div> </div>
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<div>
<div>" The inputs to the listed units have not
converged at this timestep. The values at the last
iteration will be used and the simulation will
proceed."</div>
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<div> </div>
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<div>Right now I'm doing a simulation with 5 min
timestep that works well but gets stuck at hour
150, for example. If I change the simulation start
time everytime this happens so the simulation can
continue, it keeps calculating until it gets stuck
again 200 hours later.</div>
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<div><br>
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<div>I assume the TRNEXE gets stuck because of non
convergence. Since the non converged timesteps are
neglectable, how can I set TRNSYS to automatically
ignore this timesteps and set the input/ouputs of
the problematic units to the previous ones?</div>
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<div> </div>
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<div>Is there a chapter in the TRNSYS Documentation
that I should check?</div>
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<div>Thanks in advance,</div>
</div>
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<div style="font-size:12.8px">
<blockquote type="cite"
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<div>
<div>Javier Vega</div>
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<pre style="white-space:pre-wrap">______________________________<wbr>_________________</pre></blockquote></div></blockquote><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div style="font-size:12.8px"><blockquote type="cite" style="padding-left:5px;border-left:2px solid rgb(16,16,255);margin-left:5px"><pre style="white-space:pre-wrap">TRNSYS-users mailing list</pre></blockquote></div></blockquote><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div style="font-size:12.8px"><blockquote type="cite" style="padding-left:5px;border-left:2px solid rgb(16,16,255);margin-left:5px"><pre style="white-space:pre-wrap"><a moz-do-not-send="true" href="mailto:TRNSYS-users@lists.onebuilding.org" target="_blank">TRNSYS-users@lists.<wbr>onebuilding.org</a></pre></blockquote></div></blockquote><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div style="font-size:12.8px"><blockquote type="cite" style="padding-left:5px;border-left:2px solid rgb(16,16,255);margin-left:5px"><pre style="white-space:pre-wrap"><a moz-do-not-send="true" href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/<wbr>listinfo.cgi/trnsys-users-<wbr>onebuilding.org</a></pre></blockquote></div></blockquote></blockquote><div style="font-size:12.8px"><div>
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<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
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
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