[Cbc] [Infeasible problem with multithreading enabled and (multiple or cutlength) option]

[Yves Touchard]

Hello,

First, sorry for the delay of this mail. I was in vacation ( :-) ).

I tried to update the trunk repository but revision number is still the same:

[ytouch at futuna coin-Cbc]$ svn info
Path: .
URL: https://projects.coin-or.org/svn/Cbc/trunk
Repository Root: https://projects.coin-or.org/svn/Cbc
Repository UUID: 6f23a84d-0c12-0410-9f0c-b73a89ba9ce0
Revision: 2092
Node Kind: directory
Schedule: normal
Last Changed Author: forrest
Last Changed Rev: 2092
Last Changed Date: 2014-10-03 13:58:33 +0200 (Fri, 03 Oct 2014)

[ytouch at futuna coin-Cbc]$ svn info
Path: .
URL: https://projects.coin-or.org/svn/Cbc/trunk
Repository Root: https://projects.coin-or.org/svn/Cbc
Repository UUID: 6f23a84d-0c12-0410-9f0c-b73a89ba9ce0
Revision: 2092
Node Kind: directory
Schedule: normal
Last Changed Author: forrest
Last Changed Rev: 2092
Last Changed Date: 2014-10-03 13:58:33 +0200 (Fri, 03 Oct 2014)

Is there something wrong with the URL?

Yves

On 10/18/2014 12:03 AM, John Forrest wrote:

Yves,

Error went away if I increased a tolerance slightly, but I wasn't happy
with that solution.  Digging deeper I found there was a check in
CglKnapsackCover to see if we had a valid cover - cover cut exists if
sum - rhs>tolerance.  sum - rhs was 1.0000029071477456e-07.  tolerance
was epsilon_ == 1.0e-7 so invalid cut was taken.

At this stage, when doing final checking the tolerance should be
epsilon2_ which is significantly bigger.

Modified in trunk and stable.

John Forrest



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