Re: [Bug-glpk] binary bug

[xypron]

Hello Michael,


Michael Hecht-2 wrote:
> 
> Since glpk doesn't support semi-continuous variables I tried to simulate
> it - and got 
> the described error. So where is the problem? By the way, CPLEX results in
> the same error
> but SCIP from ZIB (scip.zib.de) not! The variable RutilScBin is written to
> be zero but seems
> to be something like 0.000 ... 526547 (as I got from CPLEX) which
> destroyes the semi-continuity.
> Is there a workaround for this behaviour or better a patch?
> 
> 

I ran your problem with GLPK 4.34
http://www.nabble.com/file/p21119981/test.lp test.lp 
http://www.nabble.com/file/p21119981/test.out test.out 

The result for column RutilScBin is 0:
   No. Column name       Activity     Lower bound   Upper bound
------ ------------    ------------- ------------- -------------
    66 RutilScBin   *              0             0             1

The results for the relevant rows are:

   No.   Row name        Activity     Lower bound   Upper bound
------ ------------    ------------- ------------- -------------
    56 RutilscL                    0             0
    57 RutilscU                    0                           0

Objective:  cost = 3905960.696 (MINimum)

Which version of GLPK have you been using?

Best regards

Xypron
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