[Symphony-tickets] [SYMPHONY] #131: Error (lower bound decrease)

SYMPHONY coin-trac at coin-or.org
Fri May 23 10:29:10 EDT 2014


#131: Error (lower bound decrease)
-------------------------+-------------------------
 Reporter:  anh509       |      Owner:  tkr
     Type:  defect       |     Status:  new
 Priority:  normal       |  Milestone:
Component:  TreeManager  |    Version:  trunk (SVN)
 Keywords:               |
-------------------------+-------------------------
 I suspect the lower bound of a node gets updated in
 select_branching_object function in lp_solver in (best_can->objval).

 The following errors are thrown from tm_func.c for the attached file.

 #######Error: Child's lower bound (-1773182048431.944) is less than
 parent's (-227.215)
 #######Error: Node's lower bound (-1773182048431.944) is less than root's
 (-236.362)

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Ticket URL: <https://projects.coin-or.org/SYMPHONY/ticket/131>
SYMPHONY <http://projects.coin-or.org/SYMPHONY>
The SYMPHONY framework for parallel branch-and-cut algorithms.



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