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--></style></head><body lang="FI" link="#0563C1" vlink="#954F72"><div class="WordSection1"><p class="MsoNormal">Hello all,</p><p class="MsoNormal"> </p><p class="MsoNormal"><span lang="EN-US">We have a sawmill ERP SW product done with Microsoft tools. Programming language is C#. A new feature for the product requires mixer integer optimization with quadrative objective (least squares). Problem is quite small, some data from the NEOS result report below.</span></p><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US">I made an AMPL model about the problem and Couenne works fine with it. I used NEOS web service for the testing. Other solvers seem to work fine as well, including CBC.</span></p><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US">A few questions:</span></p><ul style="margin-top:0cm" type="disc"><li class="MsoListParagraph" style="margin-left:0cm"><span lang="EN-US">Is Couenne and all the libraries used by it under EPL license (or other business friendly license)</span></li><li class="MsoListParagraph" style="margin-left:0cm"><span lang="EN-US">Is there a suitable API available for Microsoft .NET and C#</span></li><li class="MsoListParagraph" style="margin-left:0cm"><span lang="EN-US">Is there an easy way to convert the AMPL model to .nl or directly to suitable matrices without AMPL license</span></li></ul><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US">Any good advice how to get Couenne embedded to our SW package?</span></p><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US">Kind Regards,</span></p><p class="MsoNormal"><span lang="EN-US">Juhani</span></p><div style="border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm"><p class="MsoNormal" style="border:none;padding:0cm"><span lang="EN-US"> </span></p></div><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">You are using the solver couenne.</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">Checking ampl.mod for couenne_options...</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">Checking <a href="http://ampl.com">ampl.com</a> for couenne_options...</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">Executing AMPL.</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">processing data.</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">processing commands.</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">Executing on <a href="http://prod-exec-3.neos-server.org">prod-exec-3.neos-server.org</a></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> </span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">Presolve eliminates 53 constraints and 1 variable.</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">Adjusted problem:</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">21 variables:</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> 10 binary variables</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> 11 nonlinear variables</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">19 constraints, all linear; 64 nonzeros</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> 19 inequality constraints</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";color:black">1 nonlinear objective; 11 nonzeros.</span></p><p class="MsoNormal"><span lang="EN-US"> </span></p></div></body></html>