Disciplined convex programming error: Cannot perform the operation: {convex} .* {real affine}

(I(user)*inv_pos((B_temp(user)*r(user)))-2*ti_qos) * F_temp(user) + I(user)*C <=0;

You haven;t told us what is what.

Have you proven this is convex?

This problem have solved´╝îthank you