<p>Andreas,</p>
<p>There is a new IPOPT executable (v.3.9.1) for AMPL users on Windows. It is using the MUMPS linear solver.</p>
<p><a href="http://apmonitor.com/wiki/index.php/Main/DownloadIpopt">http://apmonitor.com/wiki/index.php/Main/DownloadIpopt</a></p>
<p>This ipopt.exe was created with MSYS and GCC compilers.</p>
<p>Do you know of anyone who is willing to share standard benchmark test results when there are new releases? I have my own small (150) set of academic and industrial problems but I'm looking for someone who may already run some of the larger publicly available sets like CUTr.</p>
<p>-John</p>
<p> <br></p>
<p> </p>
<p>On Sat, Nov 27, 2010 at 3:52 PM, Andreas Waechter <<a href="mailto:andreasw@watson.ibm.com">andreasw@watson.ibm.com</a>> wrote:</p>
<blockquote><p>Dear Ipopt users,</p>
<p>I created a new Ipopt release (3.9.1). The changes include the following:</p>
<p>- Switch to the new COIN BuildTools system. The location of the libraries<br>
and header files in the install directories has slightly changed, and<br>
we now support pkg-config for the COIN projects. This new setup has<br>
been tested for a while, but in case you run into problems, please email<br>
the mailing list.</p>
<p>- Improved quasi-Newton approximation for the restoration phase. The<br>
previous versions were not working well in case the Hessian matrix was<br>
approximated and the algorithm switched to the restoration phase. In<br>
case you are using Ipopt with Hessian approximation, these recent<br>
changes might improve the performance in your setting.</p>
<p>- Interface to the R Project for Statistical Computing. Jelmer Ypma<br>
contributed interface code for the R language (see<br>
Ipopt/contrib/RInterface). Thanks, Jelmer!</p>
<p>- Intermediate callback functionality now available from C and Fortran<br>
interfaces. The C and Fortran examples show you how to use it.<br></p>
<p>Regards,</p>
<p>Andreas</p>
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</blockquote>
<p></p>