[DyLP-tickets] [DyLP] #11: wrong basis for problem with many free variables

[DyLP]

#11: wrong basis for problem with many free variables
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Reporter:  stefan  |       Owner:  lou   
    Type:  defect  |      Status:  new   
Priority:  normal  |   Component:  primal
 Version:          |    Severity:  normal
Keywords:          |  
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 Hi,

 for a problem which has a row of the form
 {{{
   sum(i, x(i)) == 0
 }}}
 where i goes over 20 elements, and the x(i) do not appear somewhere else,
 DyLP (stable/1.3) reports a solution with '''all''' x(i) variables free
 (NBFR), while I would expect to have at least one in the basis.
 I've attach the model as mps file.

 Best,
 Stefan

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Ticket URL: <https://projects.coin-or.org/DyLP/ticket/11>
DyLP <http://projects.coin-or.org/DyLP>
An implementation of the dynamic simplex algorithm for LP.