How to find out the problem for "Array indices must be positive integers or logical values"

[Mark_L_Stone]

CVX 3.0beta is riddled with bugs, which are very unlikely to ever be fixed. Use the latest build of CVX 2.2

CVX 3.0beta is riddled with bugs, which are very unlikely to ever be fixed. Do not use it. if it is installed, remove all CVX directories from the MATLAB path, then install CVX 2.2 in a new MATLAB session. Use the latest build of CVX 2.2, which can be downloaded at Download CVX | CVX Research, Inc.