[Couenne] Input for COUENNE

[Stefan Vigerske]

Hi,

> Couenne could be a solution to that, as binaries are available for Windows at
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>   <http://www.coin-or.org/download/binary/Couenne>  http://www.coin-or.org/download/binary/Couenne
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> although only up to release 0.3.2 (release 0.4.2 is available as open source code).

Couenne 0.4 binaries for Windows are included in the CoinAll 1.6 binaries at
http://www.coin-or.org/download/binary/CoinAll/


> If you have GAMS, there is an option to set the "solver" to a converter (I believe the minlp.opt file has to contain the word "convert", but I am not a GAMS expert) which writes a file ampl.mod, which is in AMPL format. The ampl.mod file can then be read by AMPL and transformed (via the command "write gfilename;") to a .nl file.

Almost correct :-).
To convert a MINLP model from GAMS to AMPL, create a file convert.opt 
which contains the line "ampl" and then call GAMS on your model with the 
options MINLP=CONVERT and OPTFILE=1.

You could also convert from GAMS to OSiL (line "osil" in convert.opt) 
and then use the OS/Couenne interface (see https://projects.coin-or.org/OS).

Stefan