[Coin-discuss] seg fault using Cbc/Clp with OsiCbcSolverInterface
John J Forrest
jjforre at us.ibm.com
Wed Aug 31 10:14:47 EDT 2005
I knew at the time I should not have created OsiCbcSolverInterface but
.........
Anyway send me the stuff and I will get round to it in a day or so.
John Forrest
Kish Shen <ks15 at icparc.ic.ac.uk>
Sent by: coin-discuss-bounces at list.coin-or.org
08/31/2005 08:00 AM
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[Coin-discuss] seg fault using Cbc/Clp with OsiCbcSolverInterface
Hi,
I am running some tests using the OsiCbcSolverInterface, and I got a seg
fault trying to solve this problem (fiber):
Coin0510I Presolve is modifying 2 integer bounds and re-presolving
Coin0506I Presolve 20 (-398) rows, 20 (-1278) columns and 70 (-4201)
elements
Clp0006I 0 Obj 407431 Primal inf 5.97197 (6) Dual inf 80791.2 (1)
Clp0006I 5 Obj 409451
Clp0001I Primal infeasible - objective value 409451
Coin0505I Presolved problem not optimal, resolve after postsolve
Segmentation fault
In this particular case, I am solving the MIP problem using Osi, rather
than directly using Cbc -- i.e. I just call Osi's branchAndBound(), with
presolve turned on for initial solve and resolve.
I have generated the C++ code that will reproduce this problem. If anyone
(I guess probably John Forrest) is interested in looking at this, please
let me know and I can send it.
Thanks and cheers,
Kish Shen
IC-Parc
Imperial College London
U.K.
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