I am trying to numerically evaluate an integral whose integrand depends on two parameters, say $(a,b)$ and when $b>>1$ I suspect (although it's not guaranteed) that the integrand is very small. Thus when $b>>1$ and I try to evaluate the integral Mathematica throws up ::slwcon errors suggesting it's either zero, rapidly oscillating or I need to increase precision. How can I get around this error to produce an actual result, even if it's ~10^-6.