Hi Hossein,<div><br></div><div>Well, it depends a lot on what are the default options used. In particular I would look towards what linear solver is being used on either case. Also, are you sure you're using the same initial guess in both cases? Are you using AMPL for both cases?</div>
<div><br></div><div>Best,</div><div> Rodrigo<br><br><div class="gmail_quote">On Sun, Aug 28, 2011 at 8:51 AM, Hossein Haghighat <span dir="ltr"><<a href="mailto:hosein.haghighat@gmail.com">hosein.haghighat@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">hello,<br>Can anybody tell me why I get two different solutions when I run my model with Ipopt version 3.8.1 (on my machine) and with version 3.8.3 on the Neos?<br>
how different are these two versions of IPOPT?
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><span style="font-family:Arial, Helvetica, sans-serif;font-size:14.1667px;border-collapse:collapse;color:rgb(51, 51, 51)"><img src="http://www.cs.cmu.edu/~aml/logos/wordmark.jpg" width="200" height="24"><br>
<strong><span><font color="#000000"><span style="background-color:rgb(255, 255, 255)">Rodrigo</span></font></span><font color="#000000"><span style="background-color:rgb(255, 255, 255)"> López-</span></font><span><font color="#000000"><span style="background-color:rgb(255, 255, 255)">Negrete</span></font></span><font color="#000000"><span style="background-color:rgb(255, 255, 255)"> de la Fuente</span></font></strong><font color="#000000"><span style="background-color:rgb(255, 255, 255)"><br>
</span></font>Doctoral Candidate <br>Email: <a href="mailto:rln@cmu.edu" style="color:rgb(7, 77, 143)" target="_blank"><span>rln@cmu.edu</span></a><div><span style="color:rgb(34, 34, 34)"><span style="background-color:rgb(255, 255, 255)">WWW</span></span><span style="background-color:rgb(255, 255, 255)">: <a href="http://rodrigo.lopez-negrete.org" target="_blank">http://rodrigo.lopez-negrete.org</a></span><span style="background-color:rgb(255, 255, 255)"><br>
</span><br>Department of Chemical Engineering<br>Carnegie Mellon University <br>5000 Forbes Ave. <br>Pittsburgh, PA 15213-3890<br>USA</div></span><br>
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