Hi Pedro, Thank you very much for your response. I got your point and why my integration returns 0.0 (since the stretch/shrink factor in the transformation goes as 1/t^2, higher patches on t will be stretched more) : (.
Increasing tolerance did not help in this case. I don't know what other method could work. I have an integral, which is spread over a large span along x-axis. regards, Nikhil
