<div dir="ltr"><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">Hi Juan,</span><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">
<br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">I have had similar problems with other solvers in AIMMS when the number of variables and constraints in my model increased, I am not a professional some tips that might help you are:</div>
<div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">1- reduce the number variables and constraints, combine them as much as possible if you are using a modelling environment such as AIMMS, AMPL, GAMS, Pyomo, etc.</div>
<div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">2- provide good initial points for your variables, something that you expect them to be close to at the end of the computations. if you are running independent iterations, good initial points would be results from the previous iteration.</div>
<div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">3- investigate the possibility of parallel computation in your modelling environment, if you are using any.</div>
<br><div class="gmail_quote">On Fri, Jun 29, 2012 at 7:57 AM, Juan Carlos Lopez Alfonso <span dir="ltr"><<a href="mailto:jc.atlantis@gmail.com" target="_blank">jc.atlantis@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi all,<br>
<br>
I have changed the stop conditions and I am sure that the<br>
implementation of my algorithm is correct. I have tested the results<br>
with a small problems and the results are correct, but when I execute<br>
my big problem the convergence is very slow and I dont know the<br>
reason. Is very difficult to test my algorithm, and for example I have<br>
one of them running for more than 2 days.<br>
<br>
someone can give any idea to solve this problem? Is normal this behavior?<br>
Best regards and thank you in advance<br>
Juan Carlos<br>
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</blockquote></div><br></div>