Opened 9 years ago

Closed 9 years ago

#47 closed defect (duplicate)

PrimalInfeasible though everything seems fine

Reported by: girardea Owned by: somebody
Priority: major Milestone:
Component: component1 Version:
Keywords: Cc:

Description

Hi,

Depending on the version of Clp I use, the attached (small problem) either solves or crashes saying the following:

Coin0506I Presolve 7 (-4) rows, 3 (-1) columns and 14 (-9) elements
Clp0006I 0  Obj 1.9814e+08 Primal inf 1.83574e+07 (6) Dual inf 0.554116 (1)
Clp0006I 2  Obj 1.9814e+08 Primal inf 1.92093e-08 (1)
Clp0006I 2  Obj 1.9814e+08
Clp0001I Primal infeasible - objective value 1.9814e+08
Coin0505I Presolved problem not optimal, resolve after postsolve
Coin0511I After Postsolve, objective 1.9814e+08, infeasibilities - dual 0 (0), primal 0 (0)
Clp0032I PrimalInfeasible objective 198140043.9 - 4 iterations time 0.002, Presolve 0.00

On a Linux Ubuntu machine, I use the Coin Clp official package for Ubuntu Natty and everything works fine. On Mac OS X, I use the latest version from svn and it gives me the result above.

What is strange is that if I read well both infeasibilities are zero. Yet Clp says PrimalInfeasible?. What should I do?

Thanks in advance

Change History (1)

comment:1 Changed 9 years ago by lou

  • Resolution set to duplicate
  • Status changed from new to closed

Duplicate #49. Closing

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