<br><font size=2 face="sans-serif">Kish,</font>
<br>
<br><font size=2 face="sans-serif">It would probably affect both. When
I got close to your error it was not in a loop it was just that a free
variable was at 1.0e20 which blows precision.</font>
<br>
<br><font size=2 face="sans-serif">John Forrest</font>
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<td width=40%><font size=1 face="sans-serif"><b>Kish Shen <ks15@icparc.ic.ac.uk></b>
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<br><font size=1 face="sans-serif">Sent by: coin-lpsolver-bounces@list.coin-or.org</font>
<p><font size=1 face="sans-serif">08/22/2005 10:46 AM</font>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td valign=top><font size=1 face="sans-serif">coin-lpsolver@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 valign=top><font size=1 face="sans-serif">Re: [Coin-lpsolver] (no subject)
(should be: possible slow solving with
CLP)</font></table>
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<br><font size=2><tt><br>
John,<br>
<br>
> Thank you for finding the weakness (a free variable entered
the basis not<br>
> quite as I expected)<br>
<br>
Do you expect this to affect both the testit run I tried (which seemed
to<br>
have got into a loop), and the original run with the Osi interface (which<br>
does not appear to be in a loop)?<br>
<br>
In the original run, where the problem is set up using the Osi interface<br>
rather than reading from the MPS file, the code I am running alway<br>
give bounds to variables -- it initially assigns -infinity to infinity
(or<br>
what getInfinity() returns) as bounds to the variable, and then adjust
the<br>
bounds for specific variable(s) if they are available. <br>
<br>
This is probably unusual for Mathematical Programming, where I think the<br>
default bounds for variable is normally 0 to infinity. Could this be a<br>
problem for the solving of l30?<br>
<br>
Would you like me to generate the Osi calls for my run of the l30 problem<br>
instance? <br>
<br>
Cheers,<br>
<br>
Kish Shen<br>
IC-Parc<br>
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