[Cbc] Infeasible for CBC (current stable), Value for CPLEX

Christoph Cullmann cullmann at absint.de
Tue Mar 1 02:16:33 EST 2011


Hi,

following example ILP is infeasible in CBC standalone solver but gets value in 
CPLEX.

Any idea, thanks in advance?

CBC says:

cullmann at imp:/local/cullmann/build/lpsolve.clpsolve.O0/lpsolve_clpsolve$ 
../usr/bin/cbc /local/cullmann/git/lpsolve/value_18621.lp 
Welcome to the CBC MILP Solver 
Version: 2.7 
Build Date: Mar  1 2011 

command line - ../usr/bin/cbc /local/cullmann/git/lpsolve/value_18621.lp 
(default strategy 1)
Continuous objective value is -18621 - 0.00 seconds
Cgl0000I Cut generators found to be infeasible!
Pre-processing says infeasible or unbounded

Greetings
Christoph

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