[Osi] Pivot in OsiClpSimplexInterface

[John Forrest]

Thomas,

I presume this can happen in debug mode.  If so what are the values of

alpha_
lowerOut_
valueOut_

If alpha_ is very small then that is bad news.  If the difference
between lowerOut_ and valueOut_ is large then maybe the eq test could be
relaxed.  If you want I could change to return with non-zero status.

John Forrest 

On Tue, 2011-03-15 at 16:58 +0100, Thomas Vincent wrote:
> Hi,
> 
> I'm trying to implement a parametric simplex for biobjective LPs using
> OsiClpSimplexInterface.
> 
> Until now I have always set outStatus to 0 when calling the pivot method
> and it seemed to work fine, except that sometimes I get the following error:
> 
>  ClpSimplex.cpp:7799: int ClpSimplex::pivot(): Assertion
> `eq(solution_[sequenceOut_], lowerOut_)' failed.
> 
> How can I determine the value of outStatus before calling the pivot method?
> 
> Thank you
> Regards,
> Thomas
> 
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