How to fix this norm squared minimisation objective function?

1

I am trying to solve an optimization with the following objective function

variable W(144,50) complex

minimize(norm(W - W_0,‘fro’)^2 )

I am getting error.
How can I fix this? W_0 is known complex matrix of same size a W.

2

help square_pos

square_pos Square of positive part.
square_pos(X) is the square of the postive parts of the elements of X;
i.e., square_pos(X)=MAX(X,0).^2. X must be real.

Disciplined convex programming information:
    square_pos(X) is convex and nondecreasing in X. Thus when used in
    CVX expressions, X must be convex (or affine).

However, given that the norm squared is the only term in the objective function, it is numerically better to not square the norm.