Help: cvx codes about convex

Nonconvex
3

As @Erling says
sum(sum(abs(abs(W(RepeatT)*normPerSlices(RepeatT)) - abs(W(RepeatK)*normPerSlices(RepeatK))))) >= 2*GiniMax*dimC(3);
does not follow CVX’s DCP rules, and doesn’t look to me that it can be reformulated as a convex constraint.