I don;t know what the dimensions of your MATLAB variables are. Is SSV a column vector? If so, will this do what you want?
norm(SSV,inf) <= 0.1
Anyhow, read Why isn't CVX accepting my model? READ THIS FIRST! . Then you would know that what you did will not be accepted by CVX, because it violates the DCP rules as documented in http://cvxr.com/cvx/doc/ .