Really need your help

Hello everyone！ Really need your help！
the error said “Disciplined convex programming error:
Cannot perform the operation: {real affine} .* {convex}”,

a(t,i)*T(t,i) is wrong, a(t,i) is a variable and T(t,i) contains another variable b (t,i), what should i do so that the code can continue to run?

You haven’t provided enough details of your problem for us to determine whether your optimization problem is convex, and can be reformulated for CVX. So have you proven this is a convex optimization problem?

thank you, mark, i will confirm the problem