[Cbc-tickets] [COIN-OR Branch-and-Cut MIP Solver] #100: Cbc 2.50 and MIPLIB 2003 pp08a.mps

[COIN-OR Branch-and-Cut MIP Solver]

#100: Cbc 2.50 and MIPLIB 2003 pp08a.mps
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  Reporter:  jcheng@…           |      Owner:  lou     
      Type:  defect             |     Status:  assigned
  Priority:  major              |    Version:  trunk   
Resolution:                     |   Keywords:          
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Changes (by lou):

  * owner:  => lou
  * priority:  trivial => major
  * version:  => trunk
  * status:  new => assigned
  * type:  task => defect


Comment:

 Yep, known problem. Been around far too long, because none of us really
 like to develop on Windows. The root cause is incautious changes to the
 node evaluation function without rebuilding the heap, which causes a
 violation of the heap property (parent better than either child) which
 causes a failure in debug checks in the MS heap implementation, which
 produces the 'invalid heap' message. Have a look at trunk r1506. I
 wouldn't want to predict how long it'll take before this makes it out to a
 stable branch, but you can probably do a local merge.  -- Lou --

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Ticket URL: <https://projects.coin-or.org/Cbc/ticket/100#comment:1>
COIN-OR Branch-and-Cut MIP Solver <http://projects.coin-or.org/Cbc>
An LP-based branch-and-cut MIP solver.