<br><font size=2 face="sans-serif">Gleb:</font>
<br>
<br><font size=2 face="sans-serif">Thanks for reporting the problem. I'd
like to take a look at it. Can you send a program/data to robinlh@us.ibm.com
so I can reproduce the error? </font>
<br><font size=2 face="sans-serif"><br>
Robin</font>
<br><font size=2 face="sans-serif"><br>
----------------------------------------------------------------------------------<br>
Robin Lougee-Heimer, PhD<br>
Program Manager, COIN-OR<br>
IBM TJ Watson Research Center<br>
1101 Kitchawan Road, Yorktown Heights, NY 10598<br>
ph: 914-945-3032 fax: 914-945-3434 <br>
robinlh@us.ibm.com<br>
http://www.coin-or.org<br>
<br>
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<td width=40%><font size=1 face="sans-serif"><b>Gleb Belov <gleb.belov@tu-dresden.de></b>
</font>
<br><font size=1 face="sans-serif">Sent by: cgl-bounces@list.coin-or.org</font>
<p><font size=1 face="sans-serif">02/20/2008 12:09 PM</font>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">cgl@list.coin-or.org</font>
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<div align=right><font size=1 face="sans-serif">cc</font></div>
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<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">[Cgl] A bug in CglKnapsackCover</font></table>
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<br><tt><font size=2>Dear developers,<br>
<br>
I use Cbc to solve many small problems (column generation). There were<br>
errors in CglKnapsackCover.cpp:<br>
cover.truncate(cover.getNumElements()-1);<br>
was called, whence the array was empty. I inserted checking but there<br>
are other errors sometimes, they are not so regular. Saving the instance<br>
and resolving separately works fine, obviously some randomization is <br>
used internally.<br>
<br>
I had to abandon cover cuts because of this.<br>
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