I dont know what is wrong with my code? I appropriate any help.

cvx_begin

variable pv(p1,s)

sl2 =norms (pv,2,2) ;

minimize norm(sl2,1);

cvx_end

Disciplined convex programming error:

Cannot perform the operation norm( {convex}, 1 )

Error in minimize (line 14)

x = evalin( ‘caller’, sprintf( '%s ', varargin{:}

) );