<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div id="yiv1336663450"><div style="color:#000;background-color:#fff;font-family:arial, helvetica, sans-serif;font-size:12pt;">
<div class="yiv1336663450MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;
line-height:200%;"><span style="font-size:10.0pt;line-height:200%;">Hi <br></span></div>
<div class="yiv1336663450MsoNormal" style="margin-bottom:0.0001pt;line-height:200%;"><span style="font-size:10pt;line-height:200%;">I am trying to solve bi-objective Linear problems using
OsiClpSimplexInterface, so I need to manually call the <i>Pivot()</i> function. <span style=""></span></span></div><div class="yiv1336663450MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;
line-height:200%;"><span style="font-size:10.0pt;line-height:200%;"><span style=""></span>I have two problems using this method - I
don’t know when I need to disable and enable the factorization? Right now I use
it every time before the pivot() function but it’s expensive for me.</span></div>
<div class="yiv1336663450MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;
line-height:200%;"><span style="font-size:10.0pt;line-height:200%;">Also in some examples I get the following error:</span></div>
<div class="yiv1336663450MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;
line-height:200%;"><i><span style="font-size:10.0pt;line-height:200%;">Assertion Failed :<span style=""> </span>eq(solution_[sequenceOut_],
lowerOut_), file...\clpsimplex.cpp, Line7813</span></i></div>
<div class="yiv1336663450MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;
line-height:200%;"><span style="font-size:10.0pt;line-height:200%;"><span style=""> </span>I would be so pleased if you
could help me with these problems.</span></div>
<div class="yiv1336663450MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;
line-height:200%;"><span style="font-size:10.0pt;line-height:200%;">Regards</span></div>
<div class="yiv1336663450MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;
line-height:200%;"><span style="font-size:10.0pt;line-height:200%;">Siamak </span></div>
</div></div></div></body></html>