```
cvx_begin
variable S_m_k_11(N, M)
variable p_m(N, M)
maximize( sum(sum(alpha1.*(log(S_m_k_11 .* p_m + B*delta2 )./log(2) ))));
subject to
....
cvx_end
```

where alpha1 is a N*M matrix, B and delta2 are constants.

Error:

Error using cvx/times (line 262)

Disciplined convex programming error:

Invalid quadratic form(s): not a square.

Error in q_m_p_m_calc_CVX (line 65)

maximize( sum(sum(alpha1.*(log(S_m_k_11 .* p_m + B*delta2 )./log(2) ))));

I am a beginner, please help me. Thanks a lot.