<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Maria,<div class=""><br class=""></div><div class="">The size of a problem is only limited by the available system memory.</div><div class=""><br class=""></div><div class="">Cheers,</div><div class=""><br class=""></div><div class="">Mike<br class=""><div><blockquote type="cite" class=""><div class="">Am 02.06.2016 um 13:00 schrieb Maria Giatsoglou <<a href="mailto:maria.giatsoglou@gmail.com" class="">maria.giatsoglou@gmail.com</a>>:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class=""><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div dir="ltr" class="">Hi Mike and Christopher,</div><div dir="ltr" class=""><br class=""></div><div class="">Thank you very much for your input.</div><div class="">I think that in this case the error was probably thrown due to an out-of-memory situation...</div><div class="">I will pay better attention to the problem size next time, but a question raised is whether there is a fixed limit at CMPL for the maximum memory it can use or it is only bounded by the available system memory. </div><div class=""><br class=""></div><div class="">All the best!</div><div class="">Maria</div><div class=""><br class=""></div></div></div></div><div class="gmail_quote">On Wed, Jun 1, 2016 at 11:43 AM, Christopher Gross <span dir="ltr" class=""><<a href="mailto:christopher.gross@unikat.uni-augsburg.de" target="_blank" class="">christopher.gross@unikat.uni-augsburg.de</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000" class=""><p class="">Hi Maria,</p><p class="">adding to what Mike said: In my experience, this can also happen
when the solver process runs out of memory and is killed by the
operating system. This will often give the error message "can not
connect the solver", and occasionally produce the error you
described.</p><p class="">Best regards,</p>
Christopher<div class=""><div class="h5"><br class="">
<br class="">
<div class="">On 2016-06-01 10:00, Mike Steglich
wrote:<br class="">
</div>
<blockquote type="cite" class="">
<pre class="">Hi Maria,
This error occurs sometimes if the model is not feasible and CBC does not write an solution file.
Cheers,
Mike
</pre>
<blockquote type="cite" class="">
<pre class="">Am 31.05.2016 um 10:06 schrieb Maria Giatsoglou <a href="mailto:maria.giatsoglou@gmail.com" target="_blank" class=""><maria.giatsoglou@gmail.com></a>:
Hi Mike,
After various issues that were solved with your help, I have managed to successfully run my optimization problem through jCMPL, using the CBC solver, with several datasets.
However, when I tried to use the same CMPL file with a larger dataset (in terms of parameters, variables and constraints), I got the following error:
jCmpl error: CMPL model generation - runningCMPL version: 1.10.0Authors: Thomas Schleiff, Mike SteglichDistributed under the GPLv3 create model instance ...write model instance ...CMPL model generation - finishedSolver - runningError (interfaces): Can't open GLPK Solution file: TestModel_160109.gsol
at jCMPL.Cmpl.solve(Unknown Source)
Do you have any thoughts on what may have gone wrong?
The error occurred when running jCMPL in Linux.
Thanks in advance.
All the best,
Maria
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</div></div><pre cols="72" class="">--
Christopher Gross, M.Sc.
Lehrstuhl für Health Care Operations/Health Information Management
Universitäres Zentrum für Gesundheitswissenschaften am Klinikum Augsburg
(UNIKA-T), Neusässer Straße 47, 86156 Augsburg;
Wirtschaftswissenschaftliche Fakultät, Universität Augsburg,
Universitätsstraße 16, 86159 Augsburg
Tel.: <a href="tel:%2B49%20821%20598-6452" value="+498215986452" target="_blank" class="">+49 821 598-6452</a>
E-Mail: <a href="mailto:christopher.gross@unikat.uni-augsburg.de" target="_blank" class="">christopher.gross@unikat.uni-augsburg.de</a>
Web: <a href="http://www.unika-t.de/" target="_blank" class="">http://www.unika-t.de/</a></pre>
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