[Coin-bcpdiscuss] Re: Coin-bcpdiscuss Digest, Vol 29, Issue 1

[Laszlo Ladanyi]

Hi Ali,

You should not have any problems. Even if Clp and Cbc are not thread safe (and
they are getting there :-) things should work as Bcp is single threaded. What
is more of a problem is that there is no stable package that has both Bcp and
Cbc in it. That means that Bcp-1.1 and whichever Cbc you get may rely on a
different versions of CoinUtils, and if the structure of a class in CoinUtils
have changed then you can get royally messed up with the C++ class virtual
tables. One thing you can do is to work with Bonmin, which is a MINLP solver.
Well, not really work with Bonmin, but get the Bonmin package, since that
relies both on Cbc and Bcp, so both libs will be in the same package, so it's
likely that you'll have no symbol-conflict. Unfortunately Bonmin is available
only from the subversion repository and you have to get the trunk version...
Check it out with 
'svn co https://projects.coin-or.org/svn/Bonmin/trunk Bonmin-trunk'
Build the code and install it. This will compile loots of stuff that you are
not interested in (like Ipopt and Bonmin itself), but it will also compile
Clp, Cbc, and Bcp. Then you can link your code against the created libs. 
Of course, it's trunk, so it might be a bit unstable... :-( (though in my
experience it is stable). So report any bugs or suspicious things you find, so
that we can look at it.

Good luck,
--Laci

On Tue, 18 Sep 2007 alikoc at mail.utexas.edu wrote:

> Hi Ted,
> 
> I am using the stable version. I obtained it using the command
> 
> svn co https://projects.coin-or.org/svn/Bcp/stable/1.1 Coin-Bcp
> 
> Thanks,
> 
> Ali
> 
> Quoting coin-bcpdiscuss-request at list.coin-or.org:
> 
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> > Today's Topics:
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> >    1. Using CBC inside BCP (alikoc at mail.utexas.edu)
> >    2. Re: Using CBC inside BCP (Ted Ralphs)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Sun, 16 Sep 2007 17:07:05 -0500
> > From: alikoc at mail.utexas.edu
> > Subject: [Coin-bcpdiscuss] Using CBC inside BCP
> > To: coin-bcpdiscuss at list.coin-or.org
> > Message-ID: <1189980425.46eda909e66f8 at webmailapp3.cc.utexas.edu>
> > Content-Type: text/plain; charset=ISO-8859-1
> >
> > Hello all,
> >
> > Can anyone help me with installing CBC inside BCP? Or is it even possible?
> >
> > During the branch and price algorithm I need to use an IP solver to solve the
> > subproblems of the column generation. I know how to add cplex, but it has
> > license limitations. When parallelizing the code, it is not possible to use
> > more than 10 processer.
> >
> >
> > I appreciate any help.
> >
> > Thanks in advance,
> >
> > Ali
> >
> >
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Sun, 16 Sep 2007 18:29:33 -0400
> > From: Ted Ralphs <tkralphs at lehigh.edu>
> > Subject: Re: [Coin-bcpdiscuss] Using CBC inside BCP
> > To: alikoc at mail.utexas.edu
> > Cc: coin-bcpdiscuss at list.coin-or.org
> > Message-ID: <46EDAE4D.4090901 at lehigh.edu>
> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> >
> > This would be fairly easy to do in theory, but my guess is that you will
> > run into problems because neither Clp or Cbc are thread safe. What
> > version of Bcp are you using? Did you get it from SVN?
> >
> > Ted
> > --
> > Dr. Ted Ralphs
> > Associate Professor
> > Industrial and Systems Engineering
> > Lehigh University
> > (610)758-4784
> > tkralphs at lehigh.edu
> > www.lehigh.edu/~tkr2
> >
> >
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> > End of Coin-bcpdiscuss Digest, Vol 29, Issue 1
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