setting scip as solver

[G]

Hi,

i'd like to use scip as solver for some test.

I created a folder and i copied inside the free software downloaded from scip's website. Then I added such folder to my path (as matlablroot,'/toolbox/scipFolder:' in the pathdef.m file)

Inside Matlab i typed

options = sdpsettings('solver','scip')
a = intvar(1,1)
optimize( [ ], a>=0, options)

but the results is a message "Solver not found"


Could you please suggest me a fix?

[Johan Löfberg]

My guess is that you haven't installed a distribution of SCIP which includes a MATLAB binary (such as the OPTI Toolbox distribution).

If you know you have installed a matlab binary, you have either installed the wrong matlab binary, or failed to add the correct path to the matlab path)

[G]

I was not aware of the OPTI toolbox.

But I don't want to install the entire tool, just the scip solver

[Johan Löfberg]

So delete everythting but scip then?

[G]

Yes, but the opti toolbox folder contains a file opti_scip.m which calls scip.m which is an enpty file (or at least every ine is commented).

So I cannot understand how it works...do you know?

[Johan Löfberg]

The important file is the binary

>> which scip -all
C:\work\solvers\OPTI 2\Solvers\scip\scip.mexw64
C:\work\solvers\OPTI 2\Solvers\scip\scip.m       % Shadowed

[G]

I looked for the mex file but there isn't in my opti toolbox folder (which i just downloaded!)

[Johan Löfberg]

From the code above it appears you are on a *nix system. OPTI Toolbox does not supply binaries for those systems, so unless you are capable of compiling your own binaries, you are out of luck,

[G]

yeah i was about to write the same.

I will try to compile the scip binary :)

[Johan Löfberg]

Good luck, I suspect it is a formidable task. If you manage, Jonathan might be interested in the build-scipt and generated binaries

[G]

ok in this case it's quite likely i will switch to some other solver ....

[Erling Andersen]

MOSEK is free for academics so that might be a choice. 

Disclaimer: I am heavily biased though towards MOSEK since they pay my salary.

[G]

Actually on my laptop I use to run gurobi, but now that i want to do some test on a different machine, that has a lot of memory and CPUs but it's not connected to the internet, installing gurobi it's a real mess because of their senseless intallation procedure.

Is that easier for mosek ?