Apparent difficulty with gramMatrices, gramMonomials

[AndreasMegatranus]

I tried a simple program based on the first example in manual.pdf. Here is the Matlab code

% Simple conic optimization (first example in manual).

m = 3; % n = 2
A = [1, 2, 3; 4, 5, 6];
b = [7; 8];

prog = spotprog;
[prog, x] = prog.newFree(m);
prog = prog.withEqs(A*x - b);

[prog, a] = prog.newPos(m);
prog = prog.withPos(a - x);
prog = prog.withPos(a - (-x));

obj = sum(a);

sol = prog.minimize(obj);

sol.SolutionQuality

This resulted in an error in the call to prog.minimize(obj). The problem was in spotprog.m, line 750, where it calls spotprogsol.

sol = spotprogsol(pr,pobj,xsol,y,zsol,info);

In line 51 of spotprogsol.m, it tries

sol.gramMatrices = prog.gramMatrices;
sol.gramMonomials = prog.gramMonomials;

It fails because prog does not have the .gramMatrices or .gramMonomials elements. I looked around further and found that these are initialized for SoS programs (in spotsosprog), but not for conic programs (spotprog). Is this a bug, or am I doing something wrong. Is the workaround to initialize these elements to NULL when formulating a conic program?

[xbrutgers]

I have the same issue when running the example "linf_fitting.m". It says "Unrecognized method, property, or field 'gramMatrices' for class 'spotprog'." Did you find a way around? Thanks!