Illegal operation: {constant} + {invalid}

[thangha_pfiev (Thang Ha)]

Hi,
anyone can help me to solve this problem ? thank you so much

Illegal operation: {convex} + {complex affine}

Hi everyone, I seen this error when trying to write an expression. I know that is caused by the violence of DCP rules but I don’t know how to modify it. Thanks so much for helping me. Disciplined convex programming error: Illegal operation: {convex} + {complex affine} Error in algo2_complex (line 130) B(1,k) = B(1,k) + log(2)/pk(k)*Rk(k) - 2*real((Uk_mmse(:,k)' * H((k-1)*N+1 : k*N,:)*Wk(:,j)));