[Couenne] Couenne with Cplex

[Pietro Belotti]

Dear Nathalie,

unfortunately I cannot replicate your problem. The error you are showing 
appears to be a missing #include in 
Couenne/src/problem/CouenneSolverInterface.cpp, which defines a template 
LP solver without ever declaring any OsiCpxSolverInterface. You could 
change CouenneSolverInterface.cpp and add the lines

#ifdef COIN_HAS_CPX
#include "OsiCpxSolverInterface.hpp"
#endif

right below the other two "#include" commands. However, this is totally 
unnecessary in the version I have tried, because no object 
OsiCpxSolverInterface is ever referenced explicitly in that source file.

More specifically: if I configure Couenne (version stable-0.3) using the 
command

../configure --with-cplex-incdir=/usr/share/cplex122/cplex/include/ilcplex --with-cplex-lib='/usr/share/cplex122/cplex/lib/x86-64_sles10_4.1/static_pic/libcplex.a -lpthread'

it builds couenne without errors and it solves MINLP problems correctly. 
One caveat: after solving the LP relaxation, for some reason 
OsiCpxSolverInterface will print an error message of the form "Cplex error 
1217: no solution found" or something similar. As far as I can understand, 
that doesn't really affect the behavior of Couenne, which in fact obtain 
the right solution from the LP solver and is able to solve the MINLP to 
global optimality. I'm just anticipating that if you receive that error 
you shouldn't worry (see related, if outdated, discussion at 
http://list.coin-or.org/pipermail/osi/2008-June/thread.html#138)

Can you please email your configuration command and the version of Couenne 
you are using?

PS: please direct all questions on Couenne to its mailing list:

couenne at list.coin-or.org


--
Pietro Belotti
Dept. of Mathematical Sciences
Clemson University
email: pbelott at clemson.edu
phone: 864-656-6765
web:   myweb.clemson.edu/~pbelott

On Wed, 1 Dec 2010, njamett at uantof.cl wrote:

> 
> Hi
> 
> I was in touch with Mr Belotti. I was working in a windows platform and installing couenne with cplex.
> 
> I had several troubles. So now I'm working in a Linux ubuntu machine.
> 
> The solvers works fine, but when I tried to configure cplex as a subsolver I had the following answer:
> 
> /home/nathalie/Couenne-trunk/Couenne/src/problem/CouenneSolverInterface.cpp: In member function 'bool Couenne::CouenneSolverInterface<T>::isProvenDualInfeasible() const [with T = OsiCpxSolverInterface]':
> /home/nathalie/Couenne-trunk/Couenne/src/problem/CouenneSolverInterface.cpp:250:   instantiated from 'void Couenne::CouenneSolverInterface<T>::solveFromHotStart() [with T = OsiCpxSolverInterface]'
> ../../../../Couenne/src/main/BonCouenneSetup.cpp:871:   instantiated from here
> /home/nathalie/Couenne-trunk/Couenne/src/problem/CouenneSolverInterface.cpp:90: error: incomplete type 'OsiCpxSolverInterface' used in nested name specifier
> make[2]: *** [BonCouenneSetup.lo] Error 1
> make[2]: se sale del directorio `/home/nathalie/Couenne-trunk/build/Couenne/src/main'
> make[1]: *** [all-recursive] Error 1
> make[1]: se sale del directorio `/home/nathalie/Couenne-trunk/build/Couenne'
> make: *** [all-recursive] Error 1
> 
> Please, can you help me with this error?
> 
> Thank you
> 
> Best regards
> 
> Nathalie Jamett
> University of Antofagasta
> Chile
>