[Cbc] Two questions on Cbc Solver with AMPL

[Feng Gao]

All right, thank you for the advice.

I am able to get the code.

Best,

Feng

On Tue, Sep 26, 2017 at 12:11 PM, Giacomo Nannicini <giacomo.n at gmail.com>
wrote:

> There should be a get.ASL file, but it might require cygwin on Windows.
> I don't know how to get ASL automatically on Windows, I guess my best
> advice is to look at the get.ASL file and repeat the steps on Windows.
>
> If you don't know how to do that, then just get the CBC binaries from
> the AMPL website.
>
> On Mon, Sep 25, 2017 at 11:36 PM, Feng Gao <mangotree.gf at gmail.com> wrote:
> > All right. I have that folder. But there is ONLY configuration files/
> > Makefiles in that folder? No need source code?
> >
> > Feng
> >
> > On Tue, Sep 26, 2017 at 11:24 AM, Giacomo Nannicini <giacomo.n at gmail.com
> >
> > wrote:
> >>
> >> You can get CBC binaries from the webpage you listed.
> >>
> >> To compile ASL with CBC, go to the ThirdPary/ASL folder, and get.ASL.
> >>
> >> G
> >>
> >> On Mon, Sep 25, 2017 at 11:22 PM, Feng Gao <mangotree.gf at gmail.com>
> wrote:
> >> > Dear Giacomo:
> >> >
> >> >    Thank you! Can you please let me know where to locate ASL code  or
> >> > binary
> >> > image? I searched AMPL website---- opensource section, but could not
> >> > find
> >> > them...
> >> >
> >> > http://ampl.com/products/solvers/open-source/
> >> >
> >> > Thanks,
> >> >
> >> > Feng
> >> >
> >> > On Mon, Sep 25, 2017 at 8:10 PM, Giacomo Nannicini <
> giacomo.n at gmail.com>
> >> > wrote:
> >> >>
> >> >> Feng,
> >> >> I believe you need to compile with the ASL solver, otherwise CBC will
> >> >> not
> >> >> have an AMPL interface. Look into ThirdParty/ASL.
> >> >>
> >> >> You can probably also get binaries directly from the AMPL website, in
> >> >> the
> >> >> open-source solver section.
> >> >>
> >> >> Giacomo
> >> >>
> >> >> On Sep 24, 2017 10:38 PM, "Feng Gao" <mangotree.gf at gmail.com> wrote:
> >> >>
> >> >> Dear Cbc Users:
> >> >>
> >> >>       I have two questions regarding to Cbc Solver with AMPL. Please
> >> >> help.
> >> >>
> >> >> 1. I use AMPL + Cbc solve to run a case, however, AMPL issued an
> error
> >> >> message "Unable to open a file" where a solution is located. I
> compiled
> >> >> the
> >> >> Cbc solver using VS and the solver is working fine in a stand-alone
> >> >> mode.
> >> >>
> >> >>
> >> >>
> >> >> ------------------------------------------------------------
> ------------------------------------------------------------
> ---------------------------------
> >> >> ampl: solve
> >> >> ampl? ;
> >> >> Welcome to the CBC MILP Solver
> >> >> Version: 2.9.9
> >> >> Build Date: Sep 19 2017
> >> >>
> >> >> command line -
> >> >> C:\COIN\Cbc\Cbc\MSVisualStudio\v10\x64-v100-Release\cbc.exe
> >> >> C:\Users\Feng\AppData\Local\Temp\at2596 -AMPL (default strategy 1)
> >> >> Unable to open file C:\Users\Feng\AppData\Local\Temp\at2596
> >> >> No match for AMPL - ? for list of commands
> >> >> Total time (CPU seconds):       0.00   (Wallclock seconds):
>  0.00
> >> >>
> >> >> Error executing "solve" command:
> >> >> can't open C:\Users\Feng\AppData\Local\Temp\at2596.sol
> >> >>
> >> >>
> >> >> ------------------------------------------------------------
> ------------------------------------------------------------
> ---------------------------------
> >> >>
> >> >> 2. How to set a "MIP GAP" termination criteria in Cbc solver command
> >> >> line.
> >> >> The manuals only provide a time limit or the maximal number of
> >> >> iterations
> >> >> termination criteria though.
> >> >>
> >> >> Thank you very much,
> >> >>
> >> >> Feng
> >> >>
> >> >>
> >> >> _______________________________________________
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> >> >> Cbc at list.coin-or.org
> >> >>
> >> >>
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> >> >>
> >> >
> >
> >
>
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