[Coin-symphony] Problems with cuts

[Ted Ralphs]

Hi Mike,

At first glance, it looks like a bug in the cut generator. Can you file 
a ticket and attach an MPS file that causes this error, so we can take a 
look?

Cheers,

Ted

Michael O'Sullivan wrote:
> Hi everyone,
> 
> I am using Symphony in C++ via the OsiSymSolverInterface. I have turned 
> on all the cut generation options and get the following output:
> 
> scl Found 0 new violated cliques with the star-clique method
> scl The largest star size was 0 (threshold 12)
> scl Enumeration 0 times, found 0 maxl cliques
> scl Greedy 0 times, found 0 maxl cliques
> scl Skipped a star b/c of small solution value 0 times
> scl    all cliques have been enumerated
> Clp6003E Matrix has 6088 large values, first at column 9, row 2674 is 
> -1.79769e+308
> Clp3003W Analysis indicates model infeasible or unbounded
> Clp6003E Matrix has 6088 large values, first at column 9, row 2674 is 
> -1.79769e+308
> Clp0004I Stopped due to errors - objective value 0
> Clp0032I Errors objective 0 - 0 iterations time 0.062
> 
> and the Clp errors continue. Would anyone be able to shed some light on 
> why these errors occur? It seems like the cuts being generated have 
> large values in them (or have not been initialised properly). I haven't 
> done any user changes to the cut generation.
> 
> Thanks in advance, Mike O'S
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-- 
Dr. Ted Ralphs
Associate Professor
Industrial and Systems Engineering
Lehigh University
(610)758-4784
tkralphs at lehigh.edu
www.lehigh.edu/~tkr2