Disciplined convex programming error: Invalid quadratic form(s): not a square

1

CH=2l
TS=50;
NQ=4;
number_nodes=9;
SPass(1)=2;
q=9;
qq=9;
cvx_begin

variable act2(CH,TS,NQ+1) integer
variable act3(CH,number_nodes) integer
variable A1 integer
variable lambda(TS) binary
variables rk(SPass(1),1) D r y1(q,qq,SPass(1)+1) y2(q,qq,SPass(1)+1)
minimize sum(lambda)

subject to
.
.
.
for s=1:TS
for f=1:CH
for q=1:NQ+1

         for i=1:number_nodes
             for j=1:number_nodes
                 
                 sum(sum(y1(i,j,:)+y2(i,j,:)))<=lambda(s).*act2(f,s,q)
             end
         end
     end
 end

end

cvx_end

.
.

Output:

Error using cvx/times (line 262)
Disciplined convex programming error:
Invalid quadratic form(s): not a square.

Error in optimsche (line 165)
sum(sum(y1(i,j,:)+y2(i,j,:)))<=lambda(s).*act2(f,s,q)