Unexpected error:

[Mark_L_Stone]

I don’t know whether this will help, but you can try it:

Error cvx_setup

This suggests you have different versions of CVX installed on your computer somewhere. I suggest that you: 1) shut down all instances of MATLAB; 2) remove ALL copies of CVX from your computer (yes, completely remove them); 3) download a new copy of CVX; 4) install it according to the instructions.