<br><font size=2 face="sans-serif">I took out assert a few days ago.</font>
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<td width=40%><font size=1 face="sans-serif"><b>"E Bouillet"
<ebouillet@hotmail.com></b> </font>
<br><font size=1 face="sans-serif">Sent by: coin-lpsolver-bounces@list.coin-or.org</font>
<p><font size=1 face="sans-serif">08/19/2005 05:51 PM</font>
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<div align=right><font size=1 face="sans-serif">To</font></div>
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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 valign=top><font size=1 face="sans-serif">[Coin-lpsolver] Assertion
failed in ClpSimplex</font></table>
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<br><font size=2><tt><br>
I am using Osi/Cbc/Clp in order to solve a weighted bin packing problem.
I <br>
use addColumn/addRow to generate the problem, do a writeMps to make sure
<br>
that it's correct, and solve it using branchAndBound - I am not an OR <br>
expert, and I am not sure that I am using the OSI interface properly -
but <br>
that works for small problems.<br>
<br>
However when I try a larger problem, it runs for a while, and I can see
that <br>
it converges to an optimal solution, until it fails an assertion <br>
(fabs(theta_)>1.0e-13) in ClpSimplex.cpp. Ignoring that assertion fail
<br>
doesn't seem to bother Clp, but I am wondering what is the impact of that
on <br>
the solution and if this happens because I built the problem improperly.
I <br>
couldn't find anything in the recent coin-lpsolver archives about that
and <br>
would greatly appreciate any help.<br>
<br>
The package is compiled for windows XP using VC++.<br>
<br>
thanks!<br>
eric,<br>
<br>
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