I am trying to solve a semidefinite programming problem. Invalid constraint: {convex} >= {convex} , CVX is giving me this error. kindly help me

code is given as:

gamma=1;

sigma=1;

cvx_begin sdp

variable V(1+2*Nl,1+2*Nl) complex semidefinite

find(real(abs(V)))

subject to

sum=0;

j=1;

for i=1:I

```
for q=1:Q
new_val= real(abs(trace(A_N_copy(:,:,j)*V) +b(:,i,q)*b(:,i,q)'));
sum = sum + new_val;
j=j+1;
end
```

end

sum1=0;

j=1;

for i=1:I

```
for q=1:Q
new_val1= real(abs(trace(A_N_copy1(:,:,j)*V) +b1(:,i,q)*b1(:,i,q)'));
%new_val1= abs(new_val1);
sum1 = sum1 + new_val1;
j=j+1;
end
```

end

sum >= real(t)*(sigma+sum1);

for k=1:1+2*Nl
real((V(k,k)))<=1;
end
V == semidefinite(1+2*Nl);

cvx_end