[Dip-tickets] [Dip] #43: Problem with bounds produced by Alps at node 0
Dip
coin-trac at coin-or.org
Sun Aug 22 21:39:40 EDT 2010
#43: Problem with bounds produced by Alps at node 0
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Reporter: kmartin | Type: defect
Status: new | Priority: minor
Version: trunk | Keywords:
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I notice that for a number of problems that I am running ALPS reports the
following lower bound at node 0
Alps0240I Processed 0 nodes, has 0 nodes, best relaxed 1e+75, best
feasible 16
This is for a minimization problem where all problems have lower bounds of
0 and upper bounds of 1. How can the best relaxed value exceed the best
feasible value for a minimization?
Note also the following odd number being reported for the depth
Alps0260I Quality of the best solution found: 16 ; depth 2147483647
Thanks
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Ticket URL: <https://projects.coin-or.org/Dip/ticket/43>
Dip <https://projects.coin-or.org/Dip>
An extensible software framework for implementing decompositon-based bounding algorithms for use in solving large-scale discrete optimization problems.
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