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<p class=MsoNormal><span lang=EN-US>Hi,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I would like the user to decide to stop the
mip-optimization based on some characteristics of the best integer solution so far.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Often solutions obtained in an early stage
of the optimization are already quite acceptable for the user.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>What I do now is </span><span lang=EN-US>in
</span><span lang=EN-GB style='color:windowtext'>CbcCompareUser::test:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'>// Test function
key PF3 <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'>If pressed: model->setMaximumSeconds(0.001);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'>And the optimization
stops gracefully.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'>However if lots of
cuts and heuristics are used the test function is not called frequently and pressing
PF3 is not noticed by the program.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'>Is it possible to
define a frequently called hook in Coin where you can ask for the best solution
so far and can specify that the optimization should be ended with the best
solution?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'>Regards<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='color:windowtext'>Rolf Steenge</span><span
lang=EN-US><o:p></o:p></span></p>
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