[Symphony-tickets] Re: [SYMPHONY] #66: Problem with CGL

[SYMPHONY]

#66: Problem with CGL
---------------------------+------------------------------------------------
  Reporter:  mosu001       |       Owner:  tkr             
      Type:  defect        |      Status:  new             
  Priority:  normal        |   Milestone:  5.2             
 Component:  CutGenerator  |     Version:  stable/5.1 (SVN)
Resolution:                |    Keywords:                  
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Comment (by menal):

 mosu001,

 Mir cut generator has an internal issue with freed rows sent by SYMPHONY.
 It is under consideration by its maintainer now. However, there is a
 workaround and for the time being, you can use Mir cuts by setting two
 more parameters:

 set generate_cgl_mir_cuts 1
 set mat_row_compress_num 0
 set mat_row_compress_ratio 0

 The lift and project cuts generator that SYMPHONY uses is numerically
 instable. There is a new  generator in COIN project and we are currently
 trying to add it to SYMPHONY. It will soon be in stable version.

 Thanks,

 Menal

-- 
Ticket URL: <https://projects.coin-or.org/SYMPHONY/ticket/66#comment:1>
SYMPHONY <http://projects.coin-or.org/SYMPHONY>
The SYMPHONY framework for parallel branch-and-cut algorithms.