Hello,everyone! I meet a problem about `pow_pos()`

,my code and error are as follow. Do you know what causes it?

**constant:** `r_ie(E,N), V(1,E), hmin_eu(E,N), sum_e(E,N), v(2,E), y_f(2,1), lamb=10;`

**variable:** ` y(2,1)`

**My Code:**

`for e=1:E I3(e,:)=r_ie(e,:)-(V(e)./(hmin_eu(e)+sum_e(e,:))).*(pow_abs((norm(y(:)-v(:,e))+lamb),2)-(norm(y_f-v(:,e))+lamb).^2); end`

**CXV Error:**

错误使用 cvx/pow_cvx (line 144)

Disciplined convex programming error:

Illegal operation: pow_abs( {convex}, {2} )

Error: cvx/pow_abs (line 13)

y = pow_cvx( x, p, ‘pow_abs’ );