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Javier,
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?
kind regards,
David
On 06/08/2017 08:11, Javier Vega via
TRNSYS-users wrote:
Jeff,
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 Non-Responding but using
somewhat 17% of my CPU. Also, my mouse cursor changes in the
TRNEXE window to the classical "loading" symbol.
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,
TRNEXE turns "Non-Responding" at the same timestep.
I'm attaching a couple of
images to illustrate the situation.
Kind regards,
Javier Vega
From: Jeff Thornton via
TRNSYS-users <trnsys-users@lists.onebuilding.org>
To: trnsys-users@lists.onebuilding.org
Cc:
Bcc:
Date: Wed, 07 Jun 2017 16:09:54
-0500
Subject: Re: [TRNSYS-users] How
to skip timesteps if they don't reach convergence?
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?
22 N. Carroll Street, Madison WI USA 53703
On 06/07/2017 3:30 pm, Javier Vega via TRNSYS-users
wrote:
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:
" 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."
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.
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?
Is there a chapter in the TRNSYS Documentation
that I should check?
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David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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d.bradley@tess-inc.com
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