Debugging anything starts with the concept of repeatedly splitting the failing system in two. You check that the input is good and verify the output is bad. Th

Debugging anything starts with the concept of repeatedly splitting the failing system in two. You check that the input is good and verify the output is bad. Then split the process in two. If things look good in the middle, split the second half and check. If things look bad in the middle, split the first half and check. Repeat this process until you have isolated the bad portion of the process to an indivisible step.