[Scip] Different solutions from scip+clp and scip+spx

Stefan Heinz heinz at zib.de
Tue Jun 1 12:29:35 MEST 2010


Hi Bahador,

the CLP interface makes a lot of troubles. We fixed already a bunch of bugs 
w.r.t. CLP. 

Thanks for sending us an instances which produces SCIP clp bug. We check if 
that bug is already fixed. 

Thanks Kati and Stefan

@Marc: What is the status of the CLP Interface ;-)

On Saturday 22 May 2010 11:19:40 Bahador Bakhshi wrote:
> Dear All,
> 
> It seems that there is a bug in the binary version of SCIP complied with
> CLP. I downloaded scip-1.2.0.linux.x86.gnu.opt.clp.zip and
> scip-1.2.0.linux.x86.gnu.opt.spx.zip. However, I got different solutions
> from these versions; SCIP+CLP finds the optimal solution as “163” while the
> optimal solution found by SCIP+SPX is “164”. I verified the solution by
> CPLEX, it finds the same solution as SCIP+SPX, “164.”
> 
> I have attached the LP file and log files. As shown in the log files, all
> parameters are the default settings.
> 
> Best Regards.
> ---Bahador.
> 



More information about the Scip mailing list