[Coin-discuss] OsiSolverInterface use and in particular OsiClpSolverInterface

[JP Fasano]

Vivian,
Your testcase has been added to OsiSolverInterfaceTest.cpp.
Thanks for submitting it.
The following solverIntefaces work fine with the test: clp, vol, soplex,
osl.
These solverInterfaces seem to have problems with it: dylp, glpk.
I don't know about xpress or cplex solverInterfaces

JP Fasano
jpfasano at us.ibm.com
(914)945-1324  (tie line 862-1324)
COIN www.coin-or.org


                                                                                                                                       
                      Vivian De Smedt                                                                                                  
                      <vivian at vdesmedt.com>          To:       coin-discuss at oss.software.ibm.com                                       
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                      coin-discuss-admin at www-        Subject:  Re: [Coin-discuss] OsiSolverInterface use and in particular             
                      124.ibm.com                     OsiClpSolverInterface                                                            
                                                                                                                                       
                                                                                                                                       
                      12/16/2002 02:58 PM                                                                                              
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Dear Osi,

To reply to FP Fasno mail asking complementary information about my
problem.

In my experience of OsiSolverInterface based on Cplex and Glpk interface
implementation lead me to define problem following the next recipe:

  - starting with an empty model
  - adding columns with no content
  - adding rows with coefficient
  - set the sense

In attachement you will find a program that work only if the INIT flag is
defined.

It equivalent work fine for Cplex, Glpk and Vol algorhithme (that last one
version should replace infinite bound of variable by finite one but that's
an explicit limitation of the solver).

Hoping that it help to understand what I mean in my previous mail.

Thank to every one for your reply and contributions.

Vivian De Smedt.


#### main.cpp has been removed from this note on January 04, 2003 by J P
Fasano