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<p>Bug in CoinPresolve which has been around for years with integer variables with infinite bounds - hopefully fixed in 2.3 and trunk<br>
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<img width="16" height="16" src="cid:1__=0ABBFCCADFA3C2338f9e8a93df938@us.ibm.com" border="0" alt="Inactive hide details for Ashutosh Mahajan ---10/22/2009 11:48:12 AM---hello everyone, for the attached problem, cbc-2.3.2 and "><font color="#424282">Ashutosh Mahajan ---10/22/2009 11:48:12 AM---hello everyone, for the attached problem, cbc-2.3.2 and also cbc-trunk report an optimal value</font><br>
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<tr valign="top"><td width="1%"><img width="96" height="1" src="cid:2__=0ABBFCCADFA3C2338f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2" color="#5F5F5F">From:</font></td><td width="100%"><img width="1" height="1" src="cid:2__=0ABBFCCADFA3C2338f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2">Ashutosh Mahajan <asm4@lehigh.edu></font></td></tr>
<tr valign="top"><td width="1%"><img width="96" height="1" src="cid:2__=0ABBFCCADFA3C2338f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2" color="#5F5F5F">To:</font></td><td width="100%"><img width="1" height="1" src="cid:2__=0ABBFCCADFA3C2338f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2">cbc@list.coin-or.org</font></td></tr>
<tr valign="top"><td width="1%"><img width="96" height="1" src="cid:2__=0ABBFCCADFA3C2338f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2" color="#5F5F5F">Date:</font></td><td width="100%"><img width="1" height="1" src="cid:2__=0ABBFCCADFA3C2338f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2">10/22/2009 11:48 AM</font></td></tr>
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<font size="2" color="#5F5F5F">Subject:</font></td><td width="100%"><img width="1" height="1" src="cid:2__=0ABBFCCADFA3C2338f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2">[Cbc] optimal solution cut off</font></td></tr>
<tr valign="top"><td width="1%"><img width="96" height="1" src="cid:2__=0ABBFCCADFA3C2338f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2" color="#5F5F5F">Sent by:</font></td><td width="100%"><img width="1" height="1" src="cid:2__=0ABBFCCADFA3C2338f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2">cbc-bounces@list.coin-or.org</font></td></tr>
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<tt>hello everyone,<br>
<br>
for the attached problem, cbc-2.3.2 and also cbc-trunk report an optimal value<br>
of -23 with the solution:<br>
Optimal - objective value -23<br>
0 UP000001 2 -3<br>
1 UP000002 4 -4<br>
2 DOW00001 0 -1<br>
3 DOW00002 2 -1<br>
4 DOW00003 1 1<br>
5 DOW00004 0 1<br>
6 DOW00005 0 7<br>
<br>
cplex reports a value of -23.75 with the solution:<br>
UP000001 1.000000<br>
UP000002 5.000000<br>
DOW00002 3.000000<br>
DOW00003 2.000000<br>
DOW00004 0.250000<br>
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<br>
--<br>
regards<br>
Ashutosh Mahajan<br>
</tt><tt><a href="http://coral.ie.lehigh.edu/~asm4">http://coral.ie.lehigh.edu/~asm4</a></tt><tt><br>
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