[Osi-tickets] Re: [COIN-OR Open Solver Interface] #2: checking solution availability in OsiXprSolverInterface

[COIN-OR Open Solver Interface]

#2: checking solution availability in OsiXprSolverInterface
----------------------+-----------------------------------------------------
  Reporter:  pbonami  |       Owner:  somebody
      Type:  defect   |      Status:  new     
  Priority:  major    |   Milestone:          
 Component:  OsiXpr   |     Version:          
Resolution:           |    Keywords:          
----------------------+-----------------------------------------------------
Changes (by mjs):

  * component:  component1 => OsiXpr

Comment:

 pstat == 7 could also mean that the problem is loaded, LP presolved and
 MIP presolved, but the solution in memory is not valid.

 Or it could be that what was intended is (pstat & 7) == 7, which would
 mean loaded, LP presolved, and MIP presolved, but validity is ignored.

 There is another test like this on line 880.  There are some other tests
 for whether presolve is done, but they are bitwise tests ((pstat & 6) ==
 0).

 Unfortunately, this is code contributed by Dash.  I will ask the author,
 but no promises that I can get an answer.

-- 
Ticket URL: <https://projects.coin-or.org/Osi/ticket/2#comment:2>
COIN-OR Open Solver Interface <http://projects.coin-or.org/Osi>
An API for a variety of LP and MIP solvers (and more).