<br><font size=2 face="sans-serif">thanks - I see it. can you try
it with the latest version of stable? </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>Ashutosh Mahajan <asm4@lehigh.edu></b>
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<p><font size=1 face="sans-serif">12/10/2009 08:38 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">Robin Lougee-Heimer/Watson/IBM@IBMUS</font>
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<div align=right><font size=1 face="sans-serif">cc</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">Subject</font></div>
<td><font size=1 face="sans-serif">Re: [Cgl] knapsackcover seems to cut
off optimal solution</font></table>
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<br><tt><font size=2>bug still persists. ticket opened. thanks.<br>
<br>
ashutosh<br>
<br>
On Thu, 10 Dec 2009, Robin Lougee-Heimer wrote:<br>
<br>
> Ashutosh:<br>
> <br>
> If this is still an issue, will you please report it
in the Cgl bug<br>
> tracking factility?<br>
> <br>
> https://projects.coin-or.org/Cgl/report<br>
> <br>
> thanks,<br>
> Robin<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>
> Ashutosh Mahajan
To cgl@list.coin-or.org<br>
> <asm4@lehigh.edu>
cc<br>
> Sent by:
Subject [Cgl] knapsackcover seems to cut off<br>
> cgl-bounces@list.coin-or.org
optimal solution<br>
> <br>
> 10/26/2009 03:18 PM<br>
> <br>
> one of the users of symphony provided an instance on
which the<br>
> KnapsackCover<br>
> cuts off the optimal solution.<br>
> <br>
> the LP files and the code that reproduces the problem
are located here:<br>
> <br>
> http://coral.ie.lehigh.edu/~asm4/tmp/knapsack/<br>
> <br>
> out1.lp is the original instance. out2.lp is the instance
obtained after<br>
> adding CglKnapsackCover inequalities. solving out2.lp
with cplex or cbc<br>
> gives<br>
> a solution value of 401, while out1.lp gives 397.<br>
> <br>
> This behaviour was seen with latest stable r792. i expect
it in the<br>
> release<br>
> version as well (though i did not check). is this a bug,
or something<br>
> wrong<br>
> with my construction?<br>
> <br>
> thanks.<br>
> --<br>
> regards<br>
> Ashutosh Mahajan<br>
> http://coral.ie.lehigh.edu/~asm4<br>
> <br>
> _______________________________________________<br>
> Cgl mailing list<br>
> Cgl@list.coin-or.org<br>
> http://list.coin-or.org/mailman/listinfo/cgl<br>
<br>
--<br>
regards<br>
Ashutosh Mahajan<br>
http://coral.ie.lehigh.edu/~asm4<br>
<br>
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