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<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Courier New";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Courier New";
color:#1F497D'>Microsoft Visual Studio 2008 has been used to generate
executables for Cbc driver4 2.3, Symphony 5.2, and GLPK 4.38. These
executables can solve many MIPLIB 2003 problems. Cbc driver4 2.3 did
outperform other two solvers in solving these MIPLIB 2003 problemsr as Cbc developers
had claimed. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Courier New";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Courier New";
color:#1F497D'>An artificial example of water supply and allocation had been
created and tested with Cbc driver4, Symphony, and GLPK. GLPK produced a
feasible solution. Symphony 5.2 produced a feasible solution, which
violated several constraints. Cbc driver4 2.3 generated a feasible solution,
which violated more constraints than Symphony 5.2.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Courier New";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Courier New";
color:#1F497D'>The mps file is attached. Will any please find out why Cbc
and Symphony cannot produce a feasible solution. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Courier New";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Courier New";
color:#1F497D'>Thanks for your time and help. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Courier New";
color:#1F497D'><o:p> </o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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