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Re: [Bug-glpk] binary bug
From: |
xypron |
Subject: |
Re: [Bug-glpk] binary bug |
Date: |
Sun, 21 Dec 2008 14:29:45 -0800 (PST) |
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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